During play enter any of the following sequences (Press the keys do not hold them):
Press 'F1', 'UP CURSOR', 'DOWN CURSOR', 'DEL', and type "ILMVS" for infinite lives.
Press 'F2', 'TAB', 'SPACE', 'F6', and type "RMADL" for infinite bombs.
Press 'F3', 'W', 'O', 'M', 'CTRL', 'X', '4', 'Y', and 'LEFT ALT' to enable level skip. Now press 'ESC' to skip levels.