- Optimized for newer iOS.
- Design updates.

- Additional instructions
- Design updates
- Performance improvements

- Restored background music
- Restored challenge level

- Pitch Fix

- Redisgn
- Performance improvements
- Optimized for iOS 11

- Optimized for iOS 10.

- new practice level

- updated pause function
- minor fixes

- Optimized for iOS7
- New icon
- Pause function fix
- General performance improvements

- Fix of score and game reset.
- General performance improvements.

- option to unlock all levels
- minor fixes and general performance improvements.

- new level settings to chose between faster and slower speed.

- new level settings to chose between C,D,E notation or DO RE MI.