I would remove the testing code, for instance pressing C caused it to crash for me. Also, it took me a second to figure out a few things, (I ended up looking a

I would remove the testing code, for instance pressing C caused it to crash for me. Also, it took me a second to figure out a few things, (I ended up looking at the source to figure out how to drop the key) and the boss battle was weird. Overall I'd say the game mechanic works and is fun, and I'd like to see the game fleshed out.