engine.scope( ({ start, cls, btn, btnp, circfill, rectfill, rect, text, caption, camera, creset, rnd, }) => { const WORLD = 384; const CANVAS = 128; const LERP = 0.08; const ENEMY_CAP = 100; const PROJ_CAP = 150; const GEM_CAP = 100; const PROJ_SPEED = 3; const MAX_HP = 5; const IFRAMES = 60; const KNOCKBACK = 8; const SHAKE_DECAY = 0.85; const SHAKE_STRENGTH = 4; const CONTACT_RANGE = 36; const COLLECT_RANGE = 6; const XP_PER_LEVEL = 5; const SHIELD_RADIUS = 16; const SHIELD_DAMAGE = 2; const SHIELD_HIT_RANGE = 25; const DMG_FLOAT_LIFE = 30; const stats = { speed: 1.5, fireRate: 20, damage: 1, bulletCount: 1, magnetRange: 20, shieldCount: 0, }; const UPGRADES = [ { name: 'fire rate', apply: () => { stats.fireRate = Math.max(5, stats.fireRate - 3); } }, { name: 'damage', apply: () => { stats.damage++; } }, { name: 'multi-shot', apply: () => { stats.bulletCount++; } }, { name: 'move speed', apply: () => { stats.speed += 0.3; } }, { name: 'magnet range', apply: () => { stats.magnetRange += 10; } }, { name: 'shield orb', apply: () => { stats.shieldCount++; } }, ]; let px, py, camX, camY, kills, hp, iFrames, shakeAmount; let state, xp, level, xpNeeded; let menuChoices, menuCursor; let wave, spawnBudget, spawnTimer, betweenWaves, betweenTimer, fireTimer; let shieldAngle; let waveAnnounce, waveAnnounceTimer; const landmarks = []; const dmgNumbers = []; const enemies = []; for (let i = 0; i < ENEMY_CAP; i++) { enemies.push({ x: 0, y: 0, speed: 0, color: 8, hp: 1, maxHp: 1, type: 'normal', active: false }); } function acquireEnemy() { for (const e of enemies) { if (!e.active) { e.active = true; return e; } } return null; } const projectiles = []; for (let i = 0; i < PROJ_CAP; i++) { projectiles.push({ x: 0, y: 0, dx: 0, dy: 0, active: false }); } function acquireProjectile() { for (const p of projectiles) { if (!p.active) { p.active = true; return p; } } return null; } const gems = []; for (let i = 0; i < GEM_CAP; i++) { gems.push({ x: 0, y: 0, active: false }); } function acquireGem() { for (const g of gems) { if (!g.active) { g.active = true; return g; } } return null; } const WAVE_PAUSE = 90; const SPAWN_INTERVAL = 12; function resetGame() { px = WORLD / 2; py = WORLD / 2; camX = px - CANVAS / 2; camY = py - CANVAS / 2; kills = 0; hp = MAX_HP; iFrames = 0; shakeAmount = 0; state = 'playing'; xp = 0; level = 1; xpNeeded = XP_PER_LEVEL; menuChoices = []; menuCursor = 0; wave = 0; spawnBudget = 0; spawnTimer = 0; betweenWaves = true; betweenTimer = 0; fireTimer = 0; shieldAngle = 0; waveAnnounce = ''; waveAnnounceTimer = 0; stats.speed = 1.5; stats.fireRate = 20; stats.damage = 1; stats.bulletCount = 1; stats.magnetRange = 20; stats.shieldCount = 0; for (const e of enemies) e.active = false; for (const p of projectiles) p.active = false; for (const g of gems) g.active = false; dmgNumbers.length = 0; } function startWave() { wave++; spawnBudget = 4 + wave * 2; spawnTimer = 0; betweenWaves = false; waveAnnounce = 'wave ' + wave; waveAnnounceTimer = 90; } function spawnEnemy() { const e = acquireEnemy(); if (!e) return; const side = Math.floor(rnd(4)); if (side === 0) { e.x = camX - 8; e.y = rnd(WORLD); } else if (side === 1) { e.x = camX + CANVAS + 8; e.y = rnd(WORLD); } else if (side === 2) { e.x = rnd(WORLD); e.y = camY - 8; } else { e.x = rnd(WORLD); e.y = camY + CANVAS + 8; } const roll = rnd(1); if (wave >= 5 && roll < 0.15) { e.type = 'tanky'; e.speed = 0.25 + wave * 0.02; e.color = 5; e.hp = 3 + Math.floor(wave / 2); e.maxHp = e.hp; } else if (wave >= 3 && roll < 0.4) { e.type = 'fast'; e.speed = 0.8 + wave * 0.08; e.color = 9; e.hp = 1; e.maxHp = 1; } else { e.type = 'normal'; e.speed = 0.4 + wave * 0.05; e.color = 8; e.hp = 1 + Math.floor(wave / 3); e.maxHp = e.hp; } } function findNearest() { let best = null; let bestDist = Infinity; for (const e of enemies) { if (!e.active) continue; const dx = e.x - px; const dy = e.y - py; const d = dx * dx + dy * dy; if (d < bestDist) { bestDist = d; best = e; } } return best; } function fireAt(t) { const dx = t.x - px; const dy = t.y - py; const baseAngle = Math.atan2(dy, dx); const spread = 15 * (Math.PI / 180); const count = stats.bulletCount; const startAngle = baseAngle - spread * (count - 1) / 2; for (let i = 0; i < count; i++) { const p = acquireProjectile(); if (!p) return; p.x = px; p.y = py; const angle = startAngle + spread * i; p.dx = Math.cos(angle) * PROJ_SPEED; p.dy = Math.sin(angle) * PROJ_SPEED; } } function spawnDmgNumber(x, y, amount) { dmgNumbers.push({ x, y, amount, life: DMG_FLOAT_LIFE }); } function killEnemy(e) { e.active = false; kills++; const g = acquireGem(); if (g) { g.x = e.x + rnd(6) - 3; g.y = e.y + rnd(6) - 3; } } function damageEnemy(e, amount) { e.hp -= amount; spawnDmgNumber(e.x, e.y - 6, amount); if (e.hp <= 0) killEnemy(e); } function levelUp() { level++; xp = 0; xpNeeded = XP_PER_LEVEL + level * 2; state = 'levelup'; menuCursor = 0; const shuffled = [...UPGRADES].sort(() => rnd(1) - 0.5); menuChoices = shuffled.slice(0, 3); } function init() { for (let i = 0; i < 12; i++) { landmarks.push({ x: Math.floor(rnd(WORLD - 40) + 12), y: Math.floor(rnd(WORLD - 40) + 12), w: Math.floor(rnd(16) + 8), h: Math.floor(rnd(16) + 8), }); } resetGame(); } function update() { if (state === 'dead') { if (btnp('z') || btnp(' ')) resetGame(); return; } if (state === 'levelup') { if (btnp('ArrowUp') || btnp('w')) { menuCursor = (menuCursor - 1 + menuChoices.length) % menuChoices.length; } if (btnp('ArrowDown') || btnp('s')) { menuCursor = (menuCursor + 1) % menuChoices.length; } if (btnp('z') || btnp(' ')) { menuChoices[menuCursor].apply(); state = 'playing'; } return; } if (btn('ArrowLeft') || btn('a')) px -= stats.speed; if (btn('ArrowRight') || btn('d')) px += stats.speed; if (btn('ArrowUp') || btn('w')) py -= stats.speed; if (btn('ArrowDown') || btn('s')) py += stats.speed; px = Math.max(3, Math.min(WORLD - 3, px)); py = Math.max(3, Math.min(WORLD - 3, py)); const targetX = px - CANVAS / 2; const targetY = py - CANVAS / 2; camX += (targetX - camX) * LERP; camY += (targetY - camY) * LERP; camX = Math.max(0, Math.min(WORLD - CANVAS, camX)); camY = Math.max(0, Math.min(WORLD - CANVAS, camY)); if (shakeAmount > 0.5) shakeAmount *= SHAKE_DECAY; else shakeAmount = 0; if (iFrames > 0) iFrames--; if (waveAnnounceTimer > 0) waveAnnounceTimer--; if (betweenWaves) { betweenTimer++; if (betweenTimer >= WAVE_PAUSE) { betweenTimer = 0; startWave(); } } else { spawnTimer++; if (spawnTimer >= SPAWN_INTERVAL && spawnBudget > 0) { spawnTimer = 0; spawnEnemy(); spawnBudget--; } if (spawnBudget <= 0) { let anyActive = false; for (const e of enemies) { if (e.active) { anyActive = true; break; } } if (!anyActive) { betweenWaves = true; betweenTimer = 0; } } } for (const e of enemies) { if (!e.active) continue; const dx = px - e.x; const dy = py - e.y; const dist = Math.sqrt(dx * dx + dy * dy); if (dist > 0) { e.x += (dx / dist) * e.speed; e.y += (dy / dist) * e.speed; } } if (iFrames <= 0) { for (const e of enemies) { if (!e.active) continue; const dx = px - e.x; const dy = py - e.y; if (dx * dx + dy * dy < CONTACT_RANGE) { hp--; iFrames = IFRAMES; shakeAmount = SHAKE_STRENGTH; const dist = Math.sqrt(dx * dx + dy * dy); if (dist > 0) { px += (dx / dist) * KNOCKBACK; py += (dy / dist) * KNOCKBACK; px = Math.max(3, Math.min(WORLD - 3, px)); py = Math.max(3, Math.min(WORLD - 3, py)); } if (hp <= 0) state = 'dead'; break; } } } if (stats.shieldCount > 0) { shieldAngle += 0.05; for (let i = 0; i < stats.shieldCount; i++) { const angle = shieldAngle + (Math.PI * 2 / stats.shieldCount) * i; const sx = px + Math.cos(angle) * SHIELD_RADIUS; const sy = py + Math.sin(angle) * SHIELD_RADIUS; for (const e of enemies) { if (!e.active) continue; const dx = sx - e.x; const dy = sy - e.y; if (dx * dx + dy * dy < SHIELD_HIT_RANGE) { damageEnemy(e, SHIELD_DAMAGE); } } } } fireTimer++; if (fireTimer >= stats.fireRate) { const nearest = findNearest(); if (nearest) { fireAt(nearest); fireTimer = 0; } } for (const p of projectiles) { if (!p.active) continue; p.x += p.dx; p.y += p.dy; if (p.x < 0 || p.x > WORLD || p.y < 0 || p.y > WORLD) p.active = false; } for (const p of projectiles) { if (!p.active) continue; for (const e of enemies) { if (!e.active) continue; const dx = p.x - e.x; const dy = p.y - e.y; if (dx * dx + dy * dy < 16) { p.active = false; damageEnemy(e, stats.damage); break; } } } for (const g of gems) { if (!g.active) continue; const dx = px - g.x; const dy = py - g.y; const distSq = dx * dx + dy * dy; if (distSq < COLLECT_RANGE * COLLECT_RANGE) { g.active = false; xp++; if (xp >= xpNeeded) levelUp(); } else if (distSq < stats.magnetRange * stats.magnetRange) { const dist = Math.sqrt(distSq); g.x += (dx / dist) * 1.5; g.y += (dy / dist) * 1.5; } } for (let i = dmgNumbers.length - 1; i >= 0; i--) { dmgNumbers[i].y -= 0.5; dmgNumbers[i].life--; if (dmgNumbers[i].life <= 0) dmgNumbers.splice(i, 1); } } function draw(time, frame) { cls(0); let sx = 0, sy = 0; if (shakeAmount > 0.5) { sx = (rnd(2) - 1) * shakeAmount; sy = (rnd(2) - 1) * shakeAmount; } camera(camX + sx, camY + sy); rect(0, 0, WORLD - 1, WORLD - 1, 6); for (const lm of landmarks) { rectfill(lm.x, lm.y, lm.x + lm.w, lm.y + lm.h, 1); } for (const g of gems) { if (!g.active) continue; circfill(g.x, g.y, 2, 11); } for (const e of enemies) { if (!e.active) continue; const r = e.type === 'tanky' ? 4 : e.type === 'fast' ? 2 : 3; circfill(e.x, e.y, r, e.color); if (e.type === 'tanky' && e.hp < e.maxHp) { const barW = 8; const fill = Math.floor((e.hp / e.maxHp) * barW); rectfill(e.x - 4, e.y - 7, e.x - 4 + barW, e.y - 6, 5); if (fill > 0) rectfill(e.x - 4, e.y - 7, e.x - 4 + fill, e.y - 6, 8); } } for (const p of projectiles) { if (!p.active) continue; circfill(p.x, p.y, 1, 10); } if (stats.shieldCount > 0) { for (let i = 0; i < stats.shieldCount; i++) { const angle = shieldAngle + (Math.PI * 2 / stats.shieldCount) * i; const ox = px + Math.cos(angle) * SHIELD_RADIUS; const oy = py + Math.sin(angle) * SHIELD_RADIUS; circfill(ox, oy, 2, 12); } } if (iFrames <= 0 || frame % 4 < 2) { circfill(px, py, 3, 7); } for (const d of dmgNumbers) { text('' + d.amount, d.x - 2, d.y, 10); } creset(); caption('wave ' + wave + ' lv ' + level + ' kills ' + kills, 1, 1, 7); if (waveAnnounceTimer > 0) { const announce = waveAnnounce; const aw = announce.length * 4; caption(announce, Math.floor((CANVAS - aw) / 2), 16, 10); } rectfill(1, CANVAS - 7, 41, CANVAS - 3, 5); const hpFill = Math.floor((hp / MAX_HP) * 40); const hpRatio = hp / MAX_HP; const hpColor = hpRatio > 0.6 ? 11 : hpRatio > 0.3 ? 10 : 8; if (hpFill > 0) rectfill(1, CANVAS - 7, 1 + hpFill, CANVAS - 3, hpColor); caption('hp', 44, CANVAS - 8, 7); rectfill(1, CANVAS - 13, 41, CANVAS - 9, 5); const xpFill = Math.floor((xp / xpNeeded) * 40); if (xpFill > 0) rectfill(1, CANVAS - 13, 1 + xpFill, CANVAS - 9, 11); caption('xp', 44, CANVAS - 14, 7); if (state === 'levelup') { const rows = menuChoices.length; const boxH = 16 + rows * 10; const boxTop = Math.floor((CANVAS - boxH) / 2); rectfill(14, boxTop, 114, boxTop + boxH, 1); rect(14, boxTop, 114, boxTop + boxH, 6); text('level up! pick one:', 18, boxTop + 3, 7); for (let i = 0; i < rows; i++) { const y = boxTop + 13 + i * 10; const color = i === menuCursor ? 10 : 6; text((i === menuCursor ? '> ' : ' ') + menuChoices[i].name, 18, y, color); } } if (state === 'dead') { const boxH = 46; const boxTop = Math.floor((CANVAS - boxH) / 2); rectfill(16, boxTop, 112, boxTop + boxH, 0); rect(16, boxTop, 112, boxTop + boxH, 8); text('you died', 42, boxTop + 4, 8); text('wave ' + wave, 48, boxTop + 14, 7); text('kills ' + kills + ' lv ' + level, 28, boxTop + 24, 7); text('press z to restart', 22, boxTop + 34, 6); } } start({ sprites: {}, sounds: {}, init, update, draw, target }); }, );

Editando: Bullet Heaven: Complete Example

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