During the game enter the following word:
IAMACHEATER to enable the cheat mode.
Then press:
CTRL+LAlt+C = Increase money.
CTRL+LSHIFT+C = Decrease money.
CTRL+LSHIFT+ numeric pad - = Decrease Gamma.
CTRL+LSHIFT+ numkeric pad + = Increase Gamma.
CTRL+LSHIFT+0 = Instant Disaster.