* mp3 files used in the code are not allowed to use outside wonderfl.net You're free to use your own sound source for JAM, if you have rights to use it.
You can throw in a small triangular pin, which could be moved, and which moves around itself. Pains are laid out like a musical score, and the way they slowly fall apart is noteworthy.
At first look, this seems to be quite simple, but gradually as you play with it, it appeals to use more differently. We love the way it inflames creativity.
Not so much the completeness of this version, but this entry fills one with expectation for what comes next. As commented, with multiple characters it might be possible to add chord effect, and with further elements this might transform into well-crafted learning application.