Carnage Inc. Cheats (PC)

On the title screen, make sure [CAPS LOCK] is on and then type in: SATAN IS YOUR MATE
  If you have typed this correct the numbers 1 2 3 4 should appear at the top of the
screen. If these don't appear, press any other key and re-type in the sentance. Now,
chosing one of the numbers 1-4 will select that level, and, when you start you will have
infinite energy.

If you walk up to a an object that is required for you to get past by solving a puzzle eg.
a locked door. You can 'move' the door, using the move icon, the move icon will not light.