A game this simple has no right to be this good, but it's excellent. So cute. But that cuteness is all expertly designed. For instance, the naive graphical style and the clever incorporation of music.
Could this game be improved? Well I wish there were a few "bonus" things you could do (click on the letterbox to make it rattle, turn the taps on and off) to interact with the environment. Just for fun :) But this was good good stuff. Bravo.