WASD to shoot. Arrow keys to move. To activate 2 player mode. hit 8 4 5 or 6 and then use the arrow keys to shoot. first player now uses ijkl to move.
Don't be alarmed. You are the good guy. You are an undercover Pixel Cyclist and you need to make sure the newest pixel-cycle gang doesn't get the secret files you have just recovered about your new mission.