Objective: Eliminate all invaders before they reach your ship!

• Movement: Use the LEFT and RIGHT buttons (A/D on desktop) to move your ship horizontally.
• Fire: Use the FIRE button (Spacebar on desktop) to shoot upward.
• Waves: Invaders move faster and shoot more often as you clear waves!
• Lives: You start with 3 lives. Don't let their bullets or ships hit you!