I'll be the first to say it--the Pushmo series as a whole has had rather forgettable music through its run, save for maybe one or two tracks that may have played as you solved the puzzles. (Mallo's March, for example.) Stretchmo, on the other hand, has some pretty catchy tunes; Let's Play Stretchmo and ESPECIALLY Poppy's Song are fantastic pieces, and it's good to see the series' music improving!