OK, this was a lot of fun and something new :) I was astounded how fast I forgot what sounds I was making just seconds ago and failed to replicate them :D Really liked both endings. It really was obvious in the retrospect, but I guess we are all so used to how games work, it won't be anybody's first method of approach.
Small issue I found, I think I found the "happy ending," but the text in the bottom left of the screen appeared and disappeared so fast I didn't manage to read it even on the second try :(