So my kids played with this for over an hour yesterday! They quickly figured out that it uses a pentatonic scale ($$ for piano lessons sort of paying off) and enjoyed coming up with some groovy syncopated loops. "Dad can you hack this to make drum soungs?" - see, told ya! When can I have a gander at the source? I have devKitPro installed already and have tonnes of drum samples in .WAV format.
BTW, they discovered the straight line pattern, called <i>Heart Attack</i> by [[User:Mr. Reaper|Mr. Reaper]].
This is favourite of mine as it reaches an equilibrium that alternates between two patterns: