Z, enter or click with your mouse on the start-button to play (works only, if you can see the start button); "I" for information (works only on the menu screen); "A" for a tutorial (works only on the menu screen); "T" to escape the round or go back "W A S D" to control player 1; "space" to shoot with player 1; "arrow keys" to control player 2; "L or mouse click" to shoot with player 2;
