Just honest high-quality craftmanship and lots of fun :) Props to the creator.
This one is really well done and gives me some ideas. Would be cool if it took advantage of bigger screens.
I tried it on my iPhone (in Safari) it made a sort of clicking sound with every "beat" or whatever it's called when the line passes over the circles. Other than that, looks great even on iPhone.
Bravo. Wonderful execution by the creator.
nice ageisopolis track in there too
Slight nitpick, the sound clips if there's too much going on at once.
The reason this scale is so popular for this type of music device - "penatatonic sequencers" - is because it's almost impossible to screw up. So you could describe using the pentatonic scale as removing some of the opportunity for making the music more interesting, but in return you almost completely eliminate any opportunity to make it "sound bad". Any note can follow any note in the pentatonic scale, which is why "randomize" or handing it to a child (which is the same thing) works as a creation method.
The only major issue is that some UI breaks as soon as a new measure begins.
It would also be really neat to use scales other than pentatonic.