First press the Print Screen key, then type in the cheat codes.

Code            Description

couch potato    Video modes ready.
freakshow       Extra ball lit.
nerf gun        Super cannon ready.
popcorn         Super pops lit.
roach motel     Crawler attack lit.
t-minus 2       Bug hunt ready.
t-minus 3       Guard duty ready.
t-minus 4       Xenophobia ready.
t-minus 5       Meteor storm ready.
t-minus 6       Rescue ready.
t-minus 7       Showdown ready.
t-minus 8       Final assault ready.
warp core       Powerball enabled.