I was also pleasantly surprised by Peaceful Sonata; there's not a lot of space to create a challenge level within the limitations but you managed to get something quite well structured put together.
I'm afraid I didn't really see eye-to-eye with the other two, though. While Tiny House was obviously lovingly and inventively constructed it's a classic environmental level which just isn't my kind of level.
As for Angry Sonata, well... maybe I just don't get it either but it felt like a difficulty-selection screen with rather pointless swearing tagged on.