Yo! Joe

Yo! Joe Cheat Mode
While playing, type "WELTRAUMKAKALAKEN" to gain all the weapons and enable the following keys:

Key     Effect]       Gain a life/       Lose a lifeY       Skip to the next levelSPACE   Transports you to the end of the flying level

Yo! Joe Slow Motion
For a slower pace, enable cheat mode, then pause the game and press S repeatedly.