{"id":6728,"date":"2025-10-28T23:15:49","date_gmt":"2025-10-29T04:15:49","guid":{"rendered":"https:\/\/www.ezcalculatoronline.com\/?page_id=6728"},"modified":"2026-05-09T23:11:00","modified_gmt":"2026-05-10T04:11:00","slug":"stack-attack-game","status":"publish","type":"page","link":"https:\/\/www.ezcalculatoronline.com\/games\/stack-attack-game\/","title":{"rendered":"Stack Attack Game"},"content":{"rendered":"<div id=\"tdi_1\" class=\"tdc-zone\"><div class=\"tdc_zone tdi_2  wpb_row td-pb-row\"  >\n<style scoped>\n\n\/* custom css *\/\n.tdi_2{\r\n                    min-height: 0;\r\n                }\n<\/style><div id=\"tdi_3\" class=\"tdc-row\"><div class=\"vc_row tdi_4  wpb_row td-pb-row\" >\n<style scoped>\n\n\/* custom css *\/\n.tdi_4,\r\n                .tdi_4 .tdc-columns{\r\n                    min-height: 0;\r\n                }.tdi_4,\r\n\t\t\t\t.tdi_4 .tdc-columns{\r\n\t\t\t\t    display: block;\r\n\t\t\t\t}.tdi_4 .tdc-columns{\r\n\t\t\t\t    width: 100%;\r\n\t\t\t\t}\n<\/style><div class=\"vc_column tdi_6  wpb_column vc_column_container tdc-column td-pb-span8\">\n<style scoped>\n\n\/* custom css *\/\n.tdi_6{\r\n                    vertical-align: baseline;\r\n                }.tdi_6 > .wpb_wrapper,\r\n\t\t\t\t.tdi_6 > .wpb_wrapper > .tdc-elements{\r\n\t\t\t\t    display: block;\r\n\t\t\t\t}.tdi_6 > .wpb_wrapper > .tdc-elements{\r\n\t\t\t\t    width: 100%;\r\n\t\t\t\t}.tdi_6 > .wpb_wrapper > .vc_row_inner{\r\n\t\t\t\t    width: auto;\r\n\t\t\t\t}.tdi_6 > .wpb_wrapper{\r\n\t\t\t\t    width: auto;\r\n\t\t\t\t    height: auto;\r\n\t\t\t\t}\n<\/style><div class=\"wpb_wrapper\" ><div class=\"wpb_wrapper td_block_wrap vc_raw_html tdi_8 \"><div class=\"td-fix-index\"><!DOCTYPE html>\n<html lang=\"vi\">\n<head>\n<meta charset=\"utf-8\" \/>\n<meta name=\"viewport\" content=\"width=device-width,initial-scale=1\" \/>\n<meta name=\"viewport\" content=\"width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no\">\n\n<title>StackAttack (Tetris) \u2014 EzCalculatorOnline<\/title>\n<style>\n:root {\n  --accent: #2310B7; \/* Mint Green *\/\n  --accent-dark: #5F5BA4; \/* Darker Mint *\/\n  --bg: #f1f5f9; \/* Slate 100 (light gray) *\/\n  --panel: #ffffff; \/* White *\/\n  --text-color: #1e293b; \/* Slate 800 (dark text) *\/\n  --text-light: #64748b; \/* Slate 500 (light text) *\/\n  --danger: #ef4444; \/* Red for game over *\/\n  --board-bg: #f8fafc; \/* Slate 50 *\/\n  --cell-empty: #e2e8f0; \/* Slate 200 *\/\n}\n\n* {\n  box-sizing: border-box;\n  margin: 0;\n  padding: 0;\n}\n\nbody {\n  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;\n  background: var(--bg);\n  color: var(--text-color);\n  min-height: 100vh;\n  flex-direction: column;\n  align-items: center;\n  justify-content: flex-start;\n  -webkit-user-select: none;\n  -ms-user-select: none;\n  user-select: none;\n}\n\n.page-content {\n  width: 100%;\n  max-width: 1100px;\n  padding: 0 10px;\n}\n\n.header {\n  text-align: center;\n  margin-bottom: 14px;\n  margin-top: 14px;\n}\n\n.header h1 {\n  color: var(--accent-dark);\n  font-size: 28px;\n  margin-bottom: 4px;\n}\n\n.header p {\n  color: var(--text-light);\n  font-size: 14px;\n}\n\n\/* Game Layout *\/\n.game-section {\n  display: flex;\n  flex-direction: column;\n  align-items: center;\n}\n\n.game-container {\n  display: flex;\n  gap: 18px;\n  background: var(--panel);\n  border-radius: 14px;\n  padding: 18px;\n  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.05);\n  position: relative;\n  width: 100%;\n  max-width: 1000px;\n  justify-content: center;\n  align-items: flex-start;\n}\n\n\/* Game Board *\/\n.game-board {\n  flex: 2;\n  display: flex;\n  flex-direction: column;\n  align-items: center;\n  position: relative;\n}\n\n.board {\n  display: grid;\n  grid-template-columns: repeat(10, 1fr);\n  grid-template-rows: repeat(20, 1fr);\n  gap: 1.5px;\n  width: 100%;\n  max-width: 360px; \/* KEY: Fixed large width for desktop *\/\n  aspect-ratio: 1\/2;\n  background: var(--board-bg);\n  border-radius: 8px;\n  overflow: hidden;\n  border: 4px solid var(--accent);\n  box-shadow: 0 5px 15px rgba(0,0,0,0.1);\n  position: relative;\n}\n\n.cell {\n  background: var(--cell-empty);\n  border-radius: 2px;\n  min-height: 0;\n}\n\n.filled {\n  border-radius: 3px;\n  box-shadow: inset 0 0 8px rgba(255, 255, 255, 0.3), inset 0 2px 4px rgba(0,0,0,0.05);\n  border: 1px solid rgba(0,0,0,0.08);\n}\n\n\/* Start Overlay *\/\n.start-overlay {\n  position: absolute;\n  inset: 0;\n  display: flex;\n  align-items: center;\n  justify-content: center;\n  pointer-events: none;\n  z-index: 10;\n}\n\n.start-card {\n  pointer-events: auto;\n  background: linear-gradient(145deg, #fff, #f5fCff);\n  padding: 22px 20px;\n  border-radius: 14px;\n  box-shadow: 0 12px 30px rgba(67, 97, 238, 0.12);\n  text-align: center;\n}\n\n.start-card h2 {\n  color: var(--accent-dark);\n  margin-bottom: 8px;\n}\n\n.big-start-btn {\n  padding: 14px 28px;\n  font-weight: 800;\n  border-radius: 12px;\n  border: none;\n  background: linear-gradient(180deg, var(--accent), var(--accent-dark));\n  color: #fff;\n  cursor: pointer;\n  box-shadow: 0 4px 10px rgba(16, 185, 129, 0.15);\n}\n\n.big-start-btn:active {\n  transform: translateY(1px);\n  background: linear-gradient(180deg, var(--accent-dark), var(--accent));\n}\n\n\/* Info Panel *\/\n.game-info {\n  flex: 1;\n  max-width: 280px; \/* Constrain info panel width *\/\n  display: flex;\n  flex-direction: column;\n  gap: 12px;\n  position: sticky; \/* KEY: Sticky info panel *\/\n  top: 18px;\n}\n\n.info-panel {\n  background: var(--board-bg);\n  border-radius: 10px;\n  padding: 12px;\n  border: 1px solid var(--cell-empty);\n  text-align: center;\n}\n\n.info-panel h2 {\n  color: var(--accent-dark);\n  font-size: 14px;\n  margin-bottom: 6px;\n  font-weight: 600;\n}\n\n.score-display {\n  font-size: 22px;\n  font-weight: 800;\n  color: var(--accent-dark);\n}\n\n.next-piece {\n  display: grid;\n  grid-template-columns: repeat(4, 1fr);\n  grid-template-rows: repeat(4, 1fr);\n  gap: 2px;\n  width: 100px;\n  height: 100px;\n  margin: 0 auto;\n  background: var(--cell-empty);\n  border-radius: 8px;\n  padding: 6px;\n}\n\n.controls {\n  display: flex;\n  flex-direction: column;\n  gap: 8px;\n  padding: 6px;\n}\n\n.controls button {\n  padding: 10px 12px;\n  border-radius: 10px;\n  border: none;\n  background: linear-gradient(180deg, var(--accent), var(--accent-dark));\n  color: #fff;\n  font-weight: 700;\n  cursor: pointer;\n  box-shadow: 0 4px 10px rgba(16, 185, 129, 0.1);\n}\n.controls button:active {\n  transform: translateY(1px);\n  background: linear-gradient(180deg, var(--accent-dark), var(--accent));\n}\n\n\n\/* Game Over Modal *\/\n.game-over {\n  position: absolute;\n  top: 50%;\n  left: 50%;\n  transform: translate(-50%, -50%);\n  width: 90%;\n  max-width: 420px;\n  background: linear-gradient(145deg, #fff, #eef3ff);\n  border-radius: 14px;\n  padding: 20px;\n  text-align: center;\n  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.18);\n  z-index: 30;\n  display: none;\n}\n\n.game-over.show {\n  display: block;\n}\n\n.game-over h2 {\n  font-size: 26px;\n  color: var(--danger);\n  margin-bottom: 6px;\n}\n\n.game-over p {\n  margin-bottom: 12px;\n  color: var(--text-color);\n}\n\n.game-over button {\n  padding: 12px 24px;\n  border-radius: 12px;\n  border: none;\n  background: linear-gradient(180deg, var(--accent), var(--accent-dark));\n  color: #fff;\n  font-size: 16px;\n  font-weight: 700;\n  cursor: pointer;\n  box-shadow: 0 4px 10px rgba(16, 185, 129, 0.15);\n}\n\n\/* Mobile Controls (hidden by default) *\/\n.mobile-controls {\n  display: none;\n}\n\nbutton {\n  touch-action: manipulation;\n  -webkit-user-select: none;\n  -webkit-tap-highlight-color: transparent;\n}\n\n\/* Footer *\/\n.content-section {\n  background: #fff;\n  border-radius: 12px;\n  padding: 14px;\n  margin-top: 18px;\n  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.04);\n}\n\n.footer {\n  margin-top: 14px;\n  text-align: center;\n  color: var(--text-light);\n  font-size: 13px;\n}\n\n\/* Responsive (Tablet) *\/\n@media (max-width: 900px) {\n  .game-container {\n    flex-direction: column;\n    align-items: center;\n    gap: 14px;\n  }\n\n  .game-board {\n    width: 100%;\n  }\n\n  .board {\n    width: 95%; \/* KEY: Use most of the width *\/\n    max-width: 400px; \/* But cap it *\/\n    margin: 0 auto 12px auto;\n  }\n  \n  .game-info {\n    width: 95%;\n    max-width: 400px; \/* Match board width *\/\n    flex-direction: row;\n    justify-content: space-evenly;\n    gap: 12px;\n    flex-wrap: wrap;\n    position: static; \/* Un-stick on mobile *\/\n  }\n}\n\n\/* Mobile Style *\/\n@media (max-width: 480px) {\n  body {\n    padding-bottom: 100px; \/* Space for controls *\/\n  }\n\n  .game-container {\n    padding: 10px;\n  }\n\n  .board {\n    width: 95%; \/* *** THAY \u0110\u1ed4I: Nh\u1ecf h\u01a1n m\u1ed9t ch\u00fat *** *\/\n    max-width: 400px;\n    aspect-ratio: 1\/1.6; \/* *** THAY \u0110\u1ed4I: B\u1edbt cao h\u01a1n *** *\/\n    margin: 0 auto;\n  }\n\n  .game-info {\n    flex-direction: row;\n    flex-wrap: wrap;\n    justify-content: space-around;\n    gap: 8px;\n    width: 95%;\n    max-width: 400px;\n    margin: 0 auto;\n  }\n\n  .info-panel {\n    flex: 1 1 45%;\n    padding: 10px;\n    font-size: 13px;\n  }\n\n  .mobile-controls {\n    display: grid;\n    grid-template-columns: repeat(3, 1fr);\n    grid-template-rows: repeat(2, 1fr);\n    gap: 10px;\n    width: 95%;\n    max-width: 400px;\n    margin: 8px auto 0 auto;\n  }\n\n  .mobile-controls button {\n    height: 60px;\n    border-radius: 12px;\n    font-size: 16px;\n    font-weight: 700;\n    border: none;\n    background: linear-gradient(180deg, var(--accent), var(--accent-dark));\n    color: #fff;\n    box-shadow: 0 4px 10px rgba(16, 185, 129, 0.1);\n  }\n\n  .mobile-controls button:active {\n    transform: scale(0.96);\n    background: linear-gradient(180deg, var(--accent-dark), var(--accent));\n  }\n  \n  \/* *** THAY \u0110\u1ed4I: S\u1eafp x\u1ebfp l\u1ea1i c\u00e1c n\u00fat *** *\/\n  #m-rotate { grid-area: 1 \/ 1 \/ 2 \/ 2; } \/* H\u00e0ng 1, C\u1ed9t 1 *\/\n  #m-drop   { grid-area: 1 \/ 2 \/ 2 \/ 3; } \/* H\u00e0ng 1, C\u1ed9t 2 *\/\n  #m-left   { grid-area: 2 \/ 1 \/ 3 \/ 2; } \/* H\u00e0ng 2, C\u1ed9t 1 *\/\n  #m-down   { grid-area: 2 \/ 2 \/ 3 \/ 3; } \/* H\u00e0ng 2, C\u1ed9t 2 *\/\n  #m-right  { grid-area: 2 \/ 3 \/ 3 \/ 4; } \/* H\u00e0ng 2, C\u1ed9t 3 *\/\n  \/* N\u00fat \u1edf H\u00e0ng 1, C\u1ed9t 3 s\u1ebd b\u1ecb tr\u1ed1ng, t\u1ea1o kho\u1ea3ng c\u00e1ch \u0111\u1eb9p *\/\n\n  .game-over {\n    width: 90%;\n    max-width: 320px;\n    padding: 16px;\n  }\n\n  .game-over h2 {\n    font-size: 22px;\n    margin-bottom: 8px;\n  }\n\n  .game-over p {\n    font-size: 14px;\n    margin-bottom: 12px;\n  }\n\n  .game-over button {\n    width: 100%;\n    font-size: 15px;\n    padding: 10px 0;\n  }\n}\n<\/style>\n\n<\/head>\n<body>\n  <div class=\"page-content\">\n    <div class=\"header\">\n      <h1>Stack Attack Game<\/h1>\n      <p>The classic Tetris-like puzzle \u2014 play in browser<\/p>\n    <\/div>\n\n    <div class=\"game-section\">\n      <div class=\"game-container\">\n\n        <div class=\"game-board\">\n          <div class=\"board\" id=\"board\"><\/div>\n\n          <!-- start overlay -->\n          <div class=\"start-overlay\" id=\"start-overlay\">\n            <div class=\"start-card\" id=\"start-card\">\n              <h2>Ready to Play?<\/h2>\n              <button id=\"big-start\" class=\"big-start-btn\" type=\"button\">START<\/button>\n              <div style=\"margin-top:8px;color:#6c757d;font-size:13px\">Tap\/click to begin<\/div>\n            <\/div>\n          <\/div>\n\n          <!-- mobile control grid (shows on small screens) -->\n          <div class=\"mobile-controls\" id=\"mobile-controls\" aria-hidden=\"true\">\n            <button type=\"button\" id=\"m-rotate\">\u21bb<\/button>\n            <button type=\"button\" id=\"m-right\">\u2192<\/button>\n            <button type=\"button\" id=\"m-left\">\u2190<\/button>\n            <button type=\"button\" id=\"m-drop\">DROP<\/button>\n            <button type=\"button\" id=\"m-down\">\u2193<\/button>\n          <\/div>\n\n        <\/div>\n\n        <div class=\"game-info\">\n          <div class=\"info-panel\">\n            <h2>SCORE<\/h2>\n            <div class=\"score-display\" id=\"score\">0<\/div>\n          <\/div>\n\n          <div class=\"info-panel\">\n            <h2>HIGH SCORE<\/h2>\n            <div class=\"score-display\" id=\"high-score\">0<\/div>\n          <\/div>\n\n          <div class=\"info-panel\">\n            <h2>NEXT<\/h2>\n            <div class=\"next-piece\" id=\"next-piece\"><\/div>\n          <\/div>\n\n          <div class=\"info-panel\">\n            <h2>CONTROLS<\/h2>\n            <div class=\"controls\">\n              <button id=\"start-btn\" type=\"button\">START<\/button>\n              <button id=\"pause-btn\" type=\"button\">PAUSE<\/button>\n              <button id=\"reset-btn\" type=\"button\">RESET<\/button>\n            <\/div>\n          <\/div>\n\n        <\/div>\n\n        <div class=\"game-over\" id=\"game-over\">\n          <h2>GAME OVER<\/h2>\n          <p>Your Score: <strong id=\"final-score\">0<\/strong><\/p>\n          <button id=\"restart-btn\" type=\"button\">PLAY AGAIN<\/button>\n        <\/div>\n\n      <\/div>\n    <\/div>\n\n    <div class=\"content-section\">\n      <h3>How to play<\/h3>\n      <p>Use arrow keys to move and rotate. Clear lines to score points. On mobile use the on-screen buttons.<\/p>\n    <\/div>\n\n    <div class=\"footer\">StackAttack &copy; 2025 \u2014 EzCalculatorOnline<\/div>\n  <\/div>\n\n<script>\n\/* ---------------- CONFIG ---------------- *\/\nconst BOARD_WIDTH = 10;\nconst BOARD_HEIGHT = 20;\nconst EMPTY = 'empty';\nconst TETROMINOES = {\n  I:{shape:[[0,0,0,0],[1,1,1,1],[0,0,0,0],[0,0,0,0]], color:'#00b4d8'},\n  J:{shape:[[1,0,0],[1,1,1],[0,0,0]], color:'#0077b6'},\n  L:{shape:[[0,0,1],[1,1,1],[0,0,0]], color:'#ff9e00'},\n  O:{shape:[[1,1],[1,1]], color:'#ffd500'},\n  S:{shape:[[0,1,1],[1,1,0],[0,0,0]], color:'#38b000'},\n  T:{shape:[[0,1,0],[1,1,1],[0,0,0]], color:'#9d4edd'},\n  Z:{shape:[[1,1,0],[0,1,1],[0,0,0]], color:'#d00000'}\n};\n\n\/* ---------------- STATE ---------------- *\/\nlet board = [];\nlet current = null;\nlet nextPiece = null;\nlet score = 0;\nlet highScore = 0;\nlet isGameOver = false;\nlet isPaused = false;\nlet dropSpeed = 1000;\nlet dropInterval = null;\nlet gameActive = false;\n\n\/* ---------------- DOM ---------------- *\/\nconst boardEl = document.getElementById('board');\nconst nextEl = document.getElementById('next-piece');\nconst scoreEl = document.getElementById('score');\nconst highEl = document.getElementById('high-score');\nconst startBtn = document.getElementById('start-btn');\nconst pauseBtn = document.getElementById('pause-btn');\nconst resetBtn = document.getElementById('reset-btn');\nconst bigStart = document.getElementById('big-start');\nconst startOverlay = document.getElementById('start-overlay');\nconst gameOverEl = document.getElementById('game-over');\nconst finalScoreEl = document.getElementById('final-score');\nconst restartBtn = document.getElementById('restart-btn');\n\nconst mobileControls = {\n  rotate: document.getElementById('m-rotate'),\n  left: document.getElementById('m-left'),\n  right: document.getElementById('m-right'),\n  down: document.getElementById('m-down'),\n  drop: document.getElementById('m-drop')\n};\n\n\/* ---------------- Audio (update URLs if you host them) ---------------- *\/\nconst bgMusic = new Audio('https:\/\/www.ezcalculatoronline.com\/wp-content\/uploads\/2025\/11\/game-gaming-background-music.mp3');\nbgMusic.loop = true; bgMusic.volume = 0.35;\nconst soundMove = new Audio('https:\/\/www.ezcalculatoronline.com\/wp-content\/uploads\/2025\/10\/move.wav');\nconst soundRotate = new Audio('https:\/\/www.ezcalculatoronline.com\/wp-content\/uploads\/2025\/10\/rotate.wav');\nconst soundDrop = new Audio('https:\/\/www.ezcalculatoronline.com\/wp-content\/uploads\/2025\/10\/drop.wav');\nconst soundClear = new Audio('https:\/\/www.ezcalculatoronline.com\/wp-content\/uploads\/2025\/06\/game-bonus-144751.mp3');\nconst soundGameOver = new Audio('https:\/\/www.ezcalculatoronline.com\/wp-content\/uploads\/2025\/10\/move.mp3');\n\nfunction play(s){ if(!s) return; try{ s.currentTime=0; s.play(); }catch(e){} }\n\n\/* ---------------- INIT ---------------- *\/\nfunction init(){\n  buildBoard();\n  createNextGrid();\n  loadHighScore();\n  resetGame();\n  attachEvents();\n}\nfunction buildBoard(){\n  boardEl.innerHTML = '';\n  board = [];\n  for(let r=0;r<BOARD_HEIGHT;r++){\n    board[r]=[];\n    for(let c=0;c<BOARD_WIDTH;c++){\n      board[r][c]=EMPTY;\n      const div = document.createElement('div');\n      div.className='cell';\n      div.id = `cell-${r}-${c}`;\n      boardEl.appendChild(div);\n    }\n  }\n}\nfunction createNextGrid(){\n  nextEl.innerHTML='';\n  for(let r=0;r<4;r++){\n    for(let c=0;c<4;c++){\n      const d = document.createElement('div');\n      d.className='cell';\n      d.id = `next-${r}-${c}`;\n      nextEl.appendChild(d);\n    }\n  }\n}\n\n\/* ---------------- Persistence ---------------- *\/\nfunction loadHighScore(){\n  try{ const raw = localStorage.getItem('stackattack_highscore'); highScore = raw?parseInt(raw,10):0; }catch(e){ highScore=0 }\n  highEl.textContent = highScore;\n}\nfunction saveHighScore(){ try{ localStorage.setItem('stackattack_highscore', highScore); }catch(e){} }\n\n\/* ---------------- Game control ---------------- *\/\nfunction resetGame(){\n  for(let r=0;r<BOARD_HEIGHT;r++) board[r].fill(EMPTY);\n  score=0; updateScore();\n  isGameOver=false; isPaused=false; gameActive=false;\n  dropSpeed=1000; if(dropInterval){ clearInterval(dropInterval); dropInterval=null; }\n  gameOverEl.classList.remove('show'); gameOverEl.style.display='none';\n  current=null; nextPiece = randomPiece();\n  spawnPiece();\n  draw();\n  showOverlay();\n  try{ bgMusic.pause(); bgMusic.currentTime=0; }catch(e){}\n}\nfunction startGame(){\n  if(isGameOver) resetGame();\n  if(!gameActive){\n    gameActive=true; startBtn.disabled=true; hideOverlay();\n    try{ bgMusic.play().catch(()=>{}); }catch(e){}\n    if(!dropInterval) dropInterval = setInterval(stepDown, dropSpeed);\n  }\n}\nfunction togglePause(){\n  if(isGameOver) return;\n  isPaused = !isPaused;\n  if(isPaused){ clearInterval(dropInterval); dropInterval=null; pauseBtn.textContent='RESUME'; gameActive=false; try{ bgMusic.pause(); }catch(e){} }\n  else{ if(!dropInterval) dropInterval=setInterval(stepDown, dropSpeed); pauseBtn.textContent='PAUSE'; gameActive=true; try{ bgMusic.play().catch(()=>{}); }catch(e){} }\n}\n\n\/* ---------------- Pieces ---------------- *\/\nfunction randomPiece(){\n  const keys = Object.keys(TETROMINOES);\n  const t = keys[Math.floor(Math.random()*keys.length)];\n  return {\n    type:t,\n    shape: JSON.parse(JSON.stringify(TETROMINOES[t].shape)),\n    color: TETROMINOES[t].color,\n    row: -1,\n    col: Math.floor(BOARD_WIDTH\/2) - Math.floor(TETROMINOES[t].shape[0].length\/2)\n  };\n}\nfunction spawnPiece(){\n  current = nextPiece;\n  current.row = -Math.max(0, current.shape.length - 2);\n  nextPiece = randomPiece();\n  drawNext();\n  if(!isValid(current.row, current.col, current.shape)){\n    \/\/ can't place -> game over\n    gameOver();\n  }\n}\n\n\/* ---------------- Draw ---------------- *\/\nfunction draw(){\n  \/\/ clear board cells\n  for(let r=0;r<BOARD_HEIGHT;r++){\n    for(let c=0;c<BOARD_WIDTH;c++){\n      const el = document.getElementById(`cell-${r}-${c}`);\n      if(!el) continue;\n      el.className = 'cell';\n      el.style.backgroundColor = '';\n    }\n  }\n  \/\/ draw placed blocks\n  for(let r=0;r<BOARD_HEIGHT;r++){\n    for(let c=0;c<BOARD_WIDTH;c++){\n      if(board[r][c] !== EMPTY){\n        const el = document.getElementById(`cell-${r}-${c}`);\n        if(el){ el.classList.add('filled'); el.style.backgroundColor = board[r][c]; }\n      }\n    }\n  }\n  \/\/ draw current piece\n  if(!current) return;\n  const shape = current.shape;\n  for(let r=0;r<shape.length;r++){\n    for(let c=0;c<shape[r].length;c++){\n      if(shape[r][c]){\n        const br = current.row + r;\n        const bc = current.col + c;\n        if(br>=0 && br<BOARD_HEIGHT && bc>=0 && bc<BOARD_WIDTH){\n          const el = document.getElementById(`cell-${br}-${bc}`);\n          if(el){ el.classList.add('filled'); el.style.backgroundColor = current.color; }\n        }\n      }\n    }\n  }\n}\nfunction drawNext(){\n  for(let r=0;r<4;r++) for(let c=0;c<4;c++){\n    const el = document.getElementById(`next-${r}-${c}`);\n    if(el){ el.className='cell'; el.style.backgroundColor=''; }\n  }\n  if(!nextPiece) return;\n  const s = nextPiece.shape;\n  const color = nextPiece.color;\n  const offsetX = Math.floor((4 - s[0].length)\/2);\n  const offsetY = Math.floor((4 - s.length)\/2);\n  for(let r=0;r<s.length;r++) for(let c=0;c<s[r].length;c++){\n    if(s[r][c]){\n      const el = document.getElementById(`next-${offsetY+r}-${offsetX+c}`);\n      if(el){ el.classList.add('filled'); el.style.backgroundColor = color; }\n    }\n  }\n}\n\n\/* ---------------- Movement & logic ---------------- *\/\nfunction isValid(row,col,shape){\n  for(let r=0;r<shape.length;r++){\n    for(let c=0;c<shape[r].length;c++){\n      if(shape[r][c]){\n        const nr = row + r;\n        const nc = col + c;\n        if(nc<0 || nc>=BOARD_WIDTH) return false;\n        if(nr>=BOARD_HEIGHT) return false;\n        if(nr>=0 && board[nr][nc] !== EMPTY) return false;\n      }\n    }\n  }\n  return true;\n}\nfunction lockPiece(){\n  const s = current.shape;\n  for(let r=0;r<s.length;r++){\n    for(let c=0;c<s[r].length;c++){\n      if(s[r][c]){\n        const br = current.row + r;\n        const bc = current.col + c;\n        if(br>=0 && br<BOARD_HEIGHT && bc>=0 && bc<BOARD_WIDTH){\n          board[br][bc] = current.color;\n        }\n      }\n    }\n  }\n  \/\/ if any block in top area, game over will be handled in spawn check\n}\nfunction clearLines(){\n  let lines=0;\n  for(let r=BOARD_HEIGHT-1;r>=0;r--){\n    if(board[r].every(cell => cell !== EMPTY)){\n      board.splice(r,1);\n      board.unshift(Array(BOARD_WIDTH).fill(EMPTY));\n      lines++;\n      r++; \/\/ recheck\n    }\n  }\n  if(lines>0){\n    const pts = {1:100,2:300,3:500,4:800};\n    score += pts[lines] || (lines*150);\n    updateScore();\n    play(soundClear);\n    \/\/ speed up\n    if(dropSpeed>80){\n      dropSpeed = Math.max(80, dropSpeed - lines*12);\n      if(dropInterval){ clearInterval(dropInterval); dropInterval = setInterval(stepDown, dropSpeed); }\n    }\n  }\n}\n\n\/* step down called by interval *\/\nfunction stepDown(){\n  if(isPaused||isGameOver||!current) return;\n  if(isValid(current.row+1,current.col,current.shape)){\n    current.row++;\n    draw();\n    play(soundMove);\n  } else {\n    lockPiece();\n    clearLines();\n    spawnPiece();\n    draw();\n  }\n}\n\n\/* movement helpers *\/\nfunction moveLeft(){ if(!current||isPaused||isGameOver) return; if(isValid(current.row,current.col-1,current.shape)){ current.col--; draw(); play(soundMove); } }\nfunction moveRight(){ if(!current||isPaused||isGameOver) return; if(isValid(current.row,current.col+1,current.shape)){ current.col++; draw(); play(soundMove); } }\nfunction moveDown(){ if(!current||isPaused||isGameOver) return; if(isValid(current.row+1,current.col,current.shape)){ current.row++; draw(); play(soundMove); } else { stepDown(); } }\nfunction hardDrop(){ if(!current||isPaused||isGameOver) return; while(isValid(current.row+1,current.col,current.shape)) current.row++; draw(); play(soundDrop); lockPiece(); clearLines(); spawnPiece(); draw(); }\nfunction rotatePiece(){\n  if(!current||isPaused||isGameOver) return;\n  const p = current.shape;\n  const rotated = p[0].map((_,i)=> p.map(row => row[row.length-1-i]));\n  const kicks = [0,-1,1,-2,2];\n  for(const k of kicks){\n    if(isValid(current.row,current.col+k,rotated)){\n      current.shape = rotated;\n      current.col += k;\n      draw();\n      play(soundRotate);\n      return;\n    }\n  }\n}\n\n\/* ---------------- Score ---------------- *\/\nfunction updateScore(){ scoreEl.textContent = score; if(score>highScore){ highScore=score; highEl.textContent = highScore; saveHighScore(); } }\n\n\/* ---------------- Overlay & Game Over ---------------- *\/\nfunction showOverlay(){ startOverlay.style.display='flex'; startOverlay.style.pointerEvents='all'; startBtn.disabled=false; }\nfunction hideOverlay(){ startOverlay.style.display='none'; startOverlay.style.pointerEvents='none'; startBtn.disabled=true; }\nfunction gameOver(){\n  isGameOver=true; gameActive=false;\n  if(dropInterval){ clearInterval(dropInterval); dropInterval=null; }\n  finalScoreEl.textContent = score;\n  gameOverEl.classList.add('show'); gameOverEl.style.display='block';\n  showOverlay(); \/\/ show start overlay again for clarity\n  try{ bgMusic.pause(); bgMusic.currentTime=0; }catch(e){}\n  play(soundGameOver);\n}\n\n\/* ---------------- Events ---------------- *\/\nfunction attachEvents(){\n  \/\/ buttons\n  startBtn.addEventListener('click', ()=>{ hideOverlay(); startGame(); });\n  bigStart.addEventListener('click', ()=>{ hideOverlay(); startGame(); });\n  pauseBtn.addEventListener('click', togglePause);\n  resetBtn.addEventListener('click', ()=>{ resetGame(); });\n  restartBtn.addEventListener('click', ()=>{ gameOverEl.classList.remove('show'); gameOverEl.style.display='none'; resetGame(); startGame(); });\n\n  \/\/ keyboard\n  document.addEventListener('keydown', (e)=>{\n    if(gameActive && ['ArrowLeft','ArrowRight','ArrowUp','ArrowDown',' '].includes(e.key)) e.preventDefault();\n    if(isPaused && e.key.toLowerCase()!=='p') return;\n    switch(e.key){\n      case 'ArrowLeft': if(gameActive) moveLeft(); break;\n      case 'ArrowRight': if(gameActive) moveRight(); break;\n      case 'ArrowDown': if(gameActive) moveDown(); break;\n      case 'ArrowUp': if(gameActive) rotatePiece(); break;\n      case ' ': if(gameActive) hardDrop(); break;\n      case 'p': case 'P': togglePause(); break;\n    }\n  });\n\n  \/\/ mobile touch buttons\n  if(mobileControls.rotate) mobileControls.rotate.addEventListener('click', rotatePiece);\n  if(mobileControls.left) mobileControls.left.addEventListener('click', moveLeft);\n  if(mobileControls.right) mobileControls.right.addEventListener('click', moveRight);\n  if(mobileControls.down) mobileControls.down.addEventListener('click', moveDown);\n  if(mobileControls.drop) mobileControls.drop.addEventListener('click', hardDrop);\n\n  \/\/ overlay click to start (background)\n  startOverlay.addEventListener('click', (ev)=>{\n    if(ev.target === startOverlay){ hideOverlay(); startGame(); }\n  });\n\n  \/\/ simple touch gestures: swipe left\/right\/down for mobile (optional)\n  addSwipeListeners();\n}\n\n\/* ---------------- Simple swipe detection for mobile ---------------- *\/\nfunction addSwipeListeners(){\n  let startX=0,startY=0, startT=0;\n  const threshold=30; \/\/ px\n  document.addEventListener('touchstart',(e)=>{\n    if(e.touches.length===1){\n      startX=e.touches[0].clientX; startY=e.touches[0].clientY; startT=Date.now();\n    }\n  });\n  document.addEventListener('touchend',(e)=>{\n    const dx = (e.changedTouches[0].clientX - startX);\n    const dy = (e.changedTouches[0].clientY - startY);\n    const dt = Date.now()-startT;\n    if(Math.abs(dx)>Math.abs(dy) && Math.abs(dx)>threshold){\n      if(dx>0) moveRight(); else moveLeft();\n    } else if(Math.abs(dy)>Math.abs(dx) && Math.abs(dy)>threshold){\n      if(dy>0) moveDown(); else rotatePiece();\n    }\n  });\n}\n\n\/* ---------------- Helper sound play ---------------- *\/\nfunction play(s){ try{ if(s){ s.currentTime=0; s.play().catch(()=>{}); } }catch(e){} }\n\n\/* ---------------- Start sequence ---------------- *\/\nfunction initRandomPieces(){\n  if(!nextPiece) nextPiece = randomPiece();\n}\n\n\/* ---------------- Boot ---------------- *\/\nwindow.addEventListener('load', ()=>{\n  init();\n});\n\n\/* ---------------- Expose some functions for debugging if needed ---------------- *\/\nwindow._STACK = { resetGame, startGame, moveLeft, moveRight, rotatePiece, hardDrop };\n\n<\/script>\n<\/body>\n<\/html>\n<\/div><\/div><div class=\"wpb_wrapper wpb_text_column td_block_wrap td_block_wrap vc_column_text tdi_9  tagdiv-type td-pb-border-top td_block_template_1\"  data-td-block-uid=\"tdi_9\" ><div class=\"td-block-title-wrap\"><\/div><div class=\"td-fix-index\"><h1 style=\"text-align: left;\" data-start=\"361\" data-end=\"418\"><strong data-start=\"365\" data-end=\"416\">Discover StackAttack \u2013 The Ultimate Puzzle Challenge<\/strong><\/h1>\n<p data-start=\"420\" data-end=\"774\">Step into the world of StackAttack, the timeless puzzle game that has entertained generations of players worldwide. With its simple yet strategic gameplay, StackAttack challenges you to arrange falling Tetrominoes to form complete horizontal lines. As lines disappear, points accumulate, and the game speeds up, testing your reflexes, focus, and planning skills.<\/p>\n<p data-start=\"776\" data-end=\"1006\">Unlike modern games with complex rules, StackAttack keeps it simple: move, rotate, and drop blocks while preventing the stack from reaching the top. Every decision matters, making Tetris not only a game of speed but also of strategy.<\/p>\n<h2 data-start=\"1013\" data-end=\"1042\"><strong data-start=\"1017\" data-end=\"1040\">Gameplay Highlights<\/strong><\/h2>\n<ul data-start=\"1044\" data-end=\"1488\">\n<li data-start=\"1150\" data-end=\"1261\">\n<p data-start=\"1152\" data-end=\"1261\"><strong data-start=\"1152\" data-end=\"1175\">Strategic Planning:<\/strong> Arrange blocks smartly to create opportunities for clearing multiple lines at once.\n<\/li>\n<li data-start=\"1262\" data-end=\"1363\">\n<p data-start=\"1264\" data-end=\"1363\"><strong data-start=\"1264\" data-end=\"1286\">Score Multipliers:<\/strong> Clearing multiple lines simultaneously increases your score exponentially.\n<\/li>\n<li data-start=\"1364\" data-end=\"1488\">\n<p data-start=\"1366\" data-end=\"1488\"><strong data-start=\"1366\" data-end=\"1388\">Endless Challenge:<\/strong> The game only ends when the blocks reach the top, making every playthrough a fresh test of skill.\n<\/li>\n<\/ul>\n<p data-start=\"1490\" data-end=\"1505\"><strong data-start=\"1490\" data-end=\"1503\">Controls:<\/strong><\/p>\n<ul data-start=\"1506\" data-end=\"1728\">\n<li data-start=\"1506\" data-end=\"1559\">\n<p data-start=\"1508\" data-end=\"1559\"><strong data-start=\"1508\" data-end=\"1531\">Arrow Left \/ Right:<\/strong> Move pieces horizontally.\n<\/li>\n<li data-start=\"1560\" data-end=\"1592\">\n<p data-start=\"1562\" data-end=\"1592\"><strong data-start=\"1562\" data-end=\"1575\">Arrow Up:<\/strong> Rotate pieces.\n<\/li>\n<li data-start=\"1593\" data-end=\"1631\">\n<p data-start=\"1595\" data-end=\"1631\"><strong data-start=\"1595\" data-end=\"1610\">Arrow Down:<\/strong> Speed up the drop.\n<\/li>\n<li data-start=\"1632\" data-end=\"1690\">\n<p data-start=\"1634\" data-end=\"1690\"><strong data-start=\"1634\" data-end=\"1648\">Space Bar:<\/strong> Instantly drop the piece to the bottom.\n<\/li>\n<li data-start=\"1691\" data-end=\"1728\">\n<p data-start=\"1693\" data-end=\"1728\"><strong data-start=\"1693\" data-end=\"1703\">P Key:<\/strong> Pause\/resume gameplay.\n<\/li>\n<\/ul>\n<p data-start=\"1730\" data-end=\"1753\"><strong data-start=\"1730\" data-end=\"1751\">Tips for Success:<\/strong><\/p>\n<ul data-start=\"1754\" data-end=\"1976\">\n<li data-start=\"1830\" data-end=\"1901\">\n<p data-start=\"1832\" data-end=\"1901\">Avoid creating isolated gaps; plan ahead to fit pieces efficiently.\n<\/li>\n<li data-start=\"1902\" data-end=\"1976\">\n<p data-start=\"1904\" data-end=\"1976\">Adapt quickly as the speed increases\u2014focus and quick reflexes are key.\n<\/li>\n<\/ul>\n<h2 data-start=\"1983\" data-end=\"2021\"><strong data-start=\"1987\" data-end=\"2019\">Why StackAttack Remains a Classic<\/strong><\/h2>\n<p data-start=\"2259\" data-end=\"2518\">The game has been adapted to countless devices, from early computers and consoles to modern smartphones. Beyond entertainment, StackAttack has been studied for its cognitive benefits, helping improve spatial awareness, problem-solving, and hand-eye coordination.<\/p>\n<h2 data-start=\"2525\" data-end=\"2573\"><strong data-start=\"2529\" data-end=\"2571\">Play StackAttack Online \u2013 Anytime, Anywhere<\/strong><\/h2>\n<p data-start=\"2575\" data-end=\"2972\">With online StackAttack, you can enjoy the classic gameplay instantly in your browser. No downloads, no installation, just pure puzzle fun. Whether you\u2019re a casual player looking for a quick break or a hardcore fan aiming for high scores, StackAttack offers endless entertainment. Its intuitive controls, responsive interface, and increasing challenge make it perfect for desktop and mobile devices alike.<\/p>\n<p data-start=\"2974\" data-end=\"3062\">Get ready to rotate, stack, and clear lines\u2014your ultimate StackAttack challenge starts now!<\/p>\n<\/div><\/div><\/div><\/div><div class=\"vc_column tdi_11  wpb_column vc_column_container tdc-column td-pb-span4 td-is-sticky\">\n<style scoped>\n\n\/* custom css *\/\n.tdi_11{\r\n                    vertical-align: middle;\r\n                }.tdi_11 > .wpb_wrapper,\r\n\t\t\t\t.tdi_11 > .wpb_wrapper > .tdc-elements{\r\n\t\t\t\t    display: block;\r\n\t\t\t\t}.tdi_11 > .wpb_wrapper > .tdc-elements{\r\n\t\t\t\t    width: 100%;\r\n\t\t\t\t}.tdi_11 > .wpb_wrapper > .vc_row_inner{\r\n\t\t\t\t    width: auto;\r\n\t\t\t\t}.tdi_11 > .wpb_wrapper{\r\n\t\t\t\t    width: auto;\r\n\t\t\t\t    height: auto;\r\n\t\t\t\t}\n<\/style><div class=\"wpb_wrapper\" data-sticky-offset=\"20\"><div class=\"wpb_wrapper td_block_wrap vc_raw_html tdi_13 \">\n<style scoped>\n\n\/* inline tdc_css att *\/\n\n.tdi_13{\npadding-top:20px !important;\n}\n\n<\/style><div class=\"td-fix-index\"><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-7396755811986582\"\n     crossorigin=\"anonymous\"><\/script>\n<!-- ads 300 x 250 -->\n<ins class=\"adsbygoogle\"\n     style=\"display:inline-block;width:300px;height:250px\"\n     data-ad-client=\"ca-pub-7396755811986582\"\n     data-ad-slot=\"2517371721\"><\/ins>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/div><\/div><div class=\"wpb_wrapper td_block_wrap vc_raw_html tdi_15 \"><div class=\"td-fix-index\"><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-7396755811986582\"\n     crossorigin=\"anonymous\"><\/script>\n<!-- ads 300 x 250 -->\n<ins class=\"adsbygoogle\"\n     style=\"display:inline-block;width:300px;height:250px\"\n     data-ad-client=\"ca-pub-7396755811986582\"\n     data-ad-slot=\"2517371721\"><\/ins>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/div><\/div><div class=\"wpb_wrapper td_block_wrap vc_raw_html tdi_17 \"><div class=\"td-fix-index\"><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-7396755811986582\"\n     crossorigin=\"anonymous\"><\/script>\n<!-- Ads KNS 300 x 600 -->\n<ins class=\"adsbygoogle\"\n     style=\"display:inline-block;width:300px;height:600px\"\n     data-ad-client=\"ca-pub-7396755811986582\"\n     data-ad-slot=\"4956265638\"><\/ins>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":6771,"parent":3814,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-6728","page","type-page","status-publish","has-post-thumbnail"],"rankMath":{"parentDomain":"ezcalculatoronline.com","noFollowDomains":[],"noFollowExcludeDomains":[],"noFollowExternalLinks":false,"featuredImageNotice":"The featured image should be at least 200 by 200 pixels to be picked up by Facebook and other social media sites.","pluginReviewed":false,"postSettings":{"linkSuggestions":true,"useFocusKeyword":false},"frontEndScore":false,"postName":"stack-attack-game","permalinkFormat":"https:\/\/www.ezcalculatoronline.com\/%pagename%\/","showLockModifiedDate":true,"assessor":{"focusKeywordLink":"https:\/\/www.ezcalculatoronline.com\/wp-admin\/edit.php?focus_keyword=%focus_keyword%&post_type=%post_type%","hasTOCPlugin":false,"primaryTaxonomy":false,"serpData":{"title":"Play Free Stack Attack Game \u2013 Classic Puzzle Game","description":"Enjoy the classic Stack Attack Game for free! 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