Pretty cool for a prototype! Reminds me of a modern version of those cool DOS shooters like Duke Nukem where you blast through enemies and look for keys to get to the end. Enjoyed some of the cool touches like automatically moving the players up steps if they run into them instead of requiring them to jump each step (though it does make the player look kinda jittery, so maybe just turn them into ramps?). Looking forward to seeing more: seems like a solid core that just needs a little more polish and punchiness to the hits!