The controller - tapping on the screen - doesnt work very well. Very frustrating when you keep doing the same level over and over not because youre not playing the rhythm correctly but because the game isnt registering your "taps," showing youve missed notes when you really didnt.
Also, not very helpful to use widely-known pieces ("Silent Night" for example) which people already know the rhythm for since childhood.
Lastly, for five bucks its pretty limited - finish all the levels and the software is now useless. Would be much more useful if it could generate random rhythms to drill you - it would never become useless!
Seanpatrickkalamazoo about Rhythm Cat Pro - Learn To Read Music