Use arrow keys or tap to navigate space. Press space or the fire button to shoot. When in computer mode, press 1, 2, and 3 to switch between guns. You can not touch the back wall. Guns: The gun you start with is a very fast firing gun that destroys enemies but not meteors. Each bullet deals one damage to the boss. It can destroy enemies but not meteors and deals 2 damage per bullet to the boss. Press 1 to switch to this gun. The second gun shoots three angled shots with a decently fast reload speed. Press 2 to switch to this gun. The final gun is more of a heavy type gun that deals 3 damage to the boss and destroys enemies AND meteors. The weakness is that it has the slowest reload speed.
@masterchief3301 for forcing me to add WASD controls. Unfortunately, you cannot change guns when playing mobile. The reason I did not add a button for it is that it would probably clog up the screen so the player can barely see what's actually happening in the game. It is not recommended to play with one hand.