Thanks for the comment! I'm glad you enjoyed it. We thought about multiplayer for sure, as far as level design I personally think the open levels suit it pretty well. There's several ways to go through a level like this and with such a simple concept replayability adds quite a bit. I think smaller levels would reduce the game to it's gimmick, but having a more complex level gives it a layer of depth otherwise not there. We could do a better job of having enemies stand in front of walls so you don't throw your ammo off the cliff so easily though, the openness certainly doesn't help with that. Also the AI is really hacky, I commented somewhere explaining how it works and I think you might enjoy reading that if you can find it. Thanks for playing