Use your arrow keys to move and space to shoot a laser. Don't let the aliens get to the bottom. Shoot the green circle with 3 bullets to activate a machine gun powerup. Survival mode is more challenging than medium but easier than hard.
Thanks to @Kevin-likes-scratch for helping me make this game. If you have any suggestions, please comment about it below. 1.1 Difficulty Modes added 1.2 Powerups added 1.3 Survival mode added
