2014.03.15- Added level singleton - Added level leaderboards
Adding levels also allowed for the introduction of leaderboards for each level. These are time based leaderboards for how fast players complete one of the stages. Sure, starting out on a level means there would be a bit of a bonus in remaining time and starting with a rainbow. The rhythm is not there, however, nor can you hop into a level far ahead with a big combo from the previous level.
So I'd like to think it balances out, particularly since the stage select is available as part of the ad-removal In App Purchase.