Fun challenge for people who find this game a little too easy at times:
"Crash Mode"
- You can only use Melee. If an enemy is out of range, first try jumping close and punching, and if it's impossible to hit no matter what, you are allowed to use the Shotgun once you have it.
- You are not allowed to take damage once. No-Hit is required.
- Take as little ammo boxes/collectibles as possible throughout the game.
(My Rooms highscore with this challenge is 45.)