Cheat mode
Press [F9] + [F10] during game play to enable cheat mode. Then, press one of the following keys to activate the corresponding cheat function.
Level skip
[F6]
More missiles
[F7]
More lives
[F8]
Disable active cheats
[F9] + [F10]
Hints
Get a present at the start of the game
Start a new game and keep going until you kill a chicken and a present comes down slowly. Press [Esc], then quit by pressing any other key. Then quickly press [Fire] when the main title screen first appears to resume. The present will still be falling, as well as all the eggs and fried chicken.