Tap Challenge: Melody at hand

Mar 17, 2016

- Adding calibration: YOU NOW CAN CUSTOMIZE THE SYNC OF THE GAME. Different device might have different latency. This feature in OPTION can enable you to overcome that and have the best sync
- Adding tutorial during transition

p/s: we are trying our best to improve the game. Please let us know if we can work out on any other things. Thanks a lot!