I really love this concept, and the execution is not bad. The art style and sound design are pretty good considering the time constraints. I think there's a lot of potential to explore and probably a long game's worth of excitement and exploration in the concept.
I think for a game like this to work, though, you're really gonna have to spend a lot of time making sure that players can't easily get themselves into situations they can't get themselves out of. You can't really know what's in the next room, and given that one of your movement keys can be taken away from you pretty quickly, it can't really fall on the player to just know that he's going to need the movement key that he no longer has in the next room. It only took me four or five rooms to get myself stuck for good.
Also, I think I may have circumvented the battery by just shutting down around the time I was running out and powering back up? I never actually tried to just run out of battery, so I'm not sure what is supposed to happen, but I was running around on empty battery for a while before I stepped on a charge pad.
Anyway, excellent game, make more of it.