A fun idea! Knife to a gunfight / gun to a knifefight was a really funny premise, and it was hilarious switching to knife and suddenly being on turbo hard mode.
Would be cool if there were more incentive to switch forms though - in particular, limiting the ammo of your gun, forcing you to switch to knife and take down some tough enemies to replenish it, really seems like a cool idea to me.
Presentation was solid too, the game looked and felt good to play. Good work!