Arrow keys to move. z to fire. Press 1 to upgrade your movement speed (10 coins the first time, 20 the second, 30 the third, etc.) Press 2 to upgrade your laser (15 the first time, 30 the second) Press m to toggle sound. If you win, it shows you the credits. Click to go through the slides. (Note: If the boss shows up on the home screen, idk why that happens. If you click the green flag again, it goes away.)
Based on Galaga, a little bit at least.
