I keep trying to figure out what the benefit to completing the musical sequences is, and right now, can't think of anything. I thought a good incentive though would be to reward a progression of gems for each sequence completed before a musical reset. 1 gem for completing 1 sequence, 2 more for completing the second sequence, etc.... The other idea I had was for each sequence completed increases a belief multiplier so that there's a benefit to building a very long sequence. And a final thought is to actually unlock musical tracks for the in-game background music.