• Stage select - On the title screen, hold down A+B on controller 1 and hit Start.

    See? Told you

  • Warp straight to boss - To warp straight to the boss of the current level, pause the game and press Select, A three times, then Up. You'll automatically unpause and find yourself against the insect monster of that level.
  • Power-up - To get the can of Raid anytime you want (and restore all your life in the process), do the same as the warp trick above, except hold down Up until the unpause sound effect is done playing. If you did it right you'll suddenly be ready to take on anything.