It's definitely a good concept. The way you move in the game is easy to learn, I picked up on it fairly quickly. It'll still take practice to perfect which is a good thing. A few things id like to say is getting the keys seems to be redundant when you can just walk through the walls. also you need to collect all cartridges to finish a level, but its a bit difficult when the cartridge lingers above your head you can't pick up another when it's there. it could just be a bug
its still pretty well put together and i hope you do more of this kind of gameplay