Nice concept, i love the chaotic expanding alien, it's almost as if it was alive right there in my computer :D unfortunately graphics aren't that great and there's no music. Remember about audiovisuals next time, or maybe invite someone to make the game with you, i promise you'll have more fun making it together! The core mechanic is great, i wish there were more levels and ways to manipulate the room in order to stop the alien, but it's understandable given the amount of time to make this game. Hope you will fiddle more with this idea, it has a huge potential :D