Not entirely sure what pressing e on the door does. It just seems to load the next day, with the creature being hungrier.
The audio was well done, the screaming sounded spooking close up and also off in the distance when you're out gathering food. The visuals were nice, although the proportions being so out of whack kinda took away from the look for me.
Definitely, a unique game-loop. I haven't seen many "feed a monster" game's around.