I really like the game concept and the art, but there's a lot left to be desired here. I see you addressed certain issues in your game description, like the non-obvious full-screen method, the loud sound effects, and the lack of CTRL options (honestly pretty disappointed not to see at least CTRL + Z/Y)! It seems like you more or less understand what went right and wrong here, so I'll just say it's a really cool game idea and I like what you've got so far, nice job!