Move: arrow keys / WASD, or steer with mouse / touch (now in all 4 directions).
Shoot: hold Space or press / touch the screen.
Asteroids: shoot them for points; smaller ones are worth more.
Enemy ships 🔻 fly in and fire back — destroy them for big points.
Bullet power-up 🟡 raises your gun level (more streams, faster fire). Getting hit drops a level.
Heart 💗 = extra life (up to 5).
Ultimate: the ULTI bar charges as you destroy things. When full, press F / Shift (or tap the bar) to unleash a screen-clearing shockwave.
Boss ⬢ appears periodically with a health bar. The first one fires slow spreads; later bosses are faster with new bullet patterns (aimed, spiral, ring, sweep) and enrage at low HP.
You have 3 lives. Difficulty ramps up over time.
GRAPHICS QUALITY
Higher looks sharper but is heavier on your device.