total mania cheats
From the base screen type -
Ctrl+Shift+cheat - Activates base cheat
Ctrl+C - Gives 1000 credits
Ctrl+A - Gives all new technologies
Ctrl+N - Skips to next level
In the game type -
Ctrl+Shift+cheat - Activates game cheat
Ctrl+I - Invincible
Ctrl+R - Recharge battery power