Didn't get why Red and Black were supposed to be avoided! Maybe if they were 'Rest' music notations instead, that would signify that the game would stop, it would be better.Also, catching Blue really slows up the gameplay and I always avoided it.
There is no objective to the game other than see how far you can go! Maybe a points system would be really nice. I liked the game, it's a fun little game. :) Good job!