Flying Tigers

To activate cheat mode, type "OCELLARIS" while playing. To use it, type any of the following while playing:

1q - change levels, up/down arrow to change level
1l - player 1 extra life
1h - extra health
1f - fireball shots
1z - laser shots
1n - napalm shots
1m - missle shots
1s - one shield 
1c - one c-bomb shot

For player 2, replace the 1 with a 2. i.e., press "2s" to add a shield to player 2.