Cheats
After finishing the Warworld level, pause the game and enter the following cheats:
Play with bizarro: up, right, down, right, up, left, down, right, up.
Unlimited City Health: Circle, Right, Circle, Right, Up, Left, Right, Circle.
All power-ups: left, circle, right, square, down, circle, up, down, square, circle, square.
All unlockable: left, up, right, down, circle, square, circle, up, right, square.