engine.scope(({ start, cls, rectfill, circfill, text, btn, btnp, rnd }) => { let mode = 'title'; let catcherX, score, lives, stars, frameCount, level, highScore; let messageText, messageTimer; let transitionTimer, nextMode; let bgStars = []; highScore = 0; for (let i = 0; i < 30; i++) { bgStars.push({ x: rnd(128), y: rnd(128), speed: 0.1 + rnd(3) * 0.1 }); } function resetGame() { catcherX = 56; score = 0; lives = 3; stars = []; frameCount = 0; level = 1; } function showMessage(msg, frames) { messageText = msg; messageTimer = frames; mode = 'message'; } function startTransition(to) { transitionTimer = 12; nextMode = to; mode = 'transition'; } function updateTitle() { for (let i = 0; i < bgStars.length; i++) { bgStars[i].y += bgStars[i].speed; if (bgStars[i].y > 128) { bgStars[i].y = 0; bgStars[i].x = rnd(128); } } if (btnp('z')) { resetGame(); startTransition('playing'); } } function updateTransition() { transitionTimer--; if (transitionTimer <= 0) mode = nextMode; } function updatePlaying() { frameCount++; if (btn('ArrowLeft') && catcherX > 0) catcherX -= 2; if (btn('ArrowRight') && catcherX < 112) catcherX += 2; let spawnRate = Math.max(15, 40 - level * 5); if (frameCount % spawnRate === 0) { stars.push({ x: 4 + rnd(120), y: 0, speed: 0.5 + level * 0.3 }); } for (let i = stars.length - 1; i >= 0; i--) { stars[i].y += stars[i].speed; if (stars[i].y >= 116 && stars[i].x >= catcherX && stars[i].x <= catcherX + 16) { score++; stars.splice(i, 1); if (score > 0 && score % 10 === 0) { level++; showMessage('LEVEL ' + level + '!', 60); } continue; } if (stars[i].y > 128) { lives--; stars.splice(i, 1); if (lives <= 0) { if (score > highScore) highScore = score; mode = 'gameover'; } } } } function updateMessage() { messageTimer--; if (messageTimer <= 0) mode = 'playing'; } function updateGameover() { if (btnp('z')) startTransition('title'); } function drawTitle() { cls(1); for (let i = 0; i < bgStars.length; i++) { circfill(bgStars[i].x, bgStars[i].y, 1, 10); } text('CATCH THE', 36, 36, 7); text('FALLING STARS', 26, 46, 10); text('PRESS Z TO START', 20, 76, 6); if (highScore > 0) { text('BEST: ' + highScore, 44, 90, 9); } } function drawTransition() { cls(transitionTimer % 2 === 0 ? 7 : 0); } function drawPlaying() { cls(1); for (let i = 0; i < stars.length; i++) { circfill(stars[i].x, stars[i].y, 2, 10); } rectfill(catcherX, 118, catcherX + 16, 122, 12); text('SCORE: ' + score, 2, 2, 7); text('LIVES: ' + lives, 92, 2, 7); text('LV ' + level, 52, 2, 6); } function drawMessage() { cls(1); for (let i = 0; i < stars.length; i++) { circfill(stars[i].x, stars[i].y, 2, 10); } rectfill(catcherX, 118, catcherX + 16, 122, 12); rectfill(24, 48, 104, 72, 0); text(messageText, 38, 56, 10); } function drawGameover() { cls(0); text('GAME OVER', 34, 44, 8); text('SCORE: ' + score, 40, 58, 7); if (highScore > 0) { text('BEST: ' + highScore, 44, 70, 9); } text('Z TO RETRY', 32, 86, 6); } function update() { if (mode === 'title') updateTitle(); else if (mode === 'transition') updateTransition(); else if (mode === 'playing') updatePlaying(); else if (mode === 'message') updateMessage(); else if (mode === 'gameover') updateGameover(); } function draw() { if (mode === 'title') drawTitle(); else if (mode === 'transition') drawTransition(); else if (mode === 'playing') drawPlaying(); else if (mode === 'message') drawMessage(); else if (mode === 'gameover') drawGameover(); } start({ sprites: {}, sounds: {}, update, draw, target }); });

Editing: State Machines: Complete Example

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