I'm certainly not well enough coordinated for this game, but that being said, its very cute and very well made. Its a relaxing little game (even if i can never get those damn high hearts >:( )
Like others have mentioned, the only thing that bats against the game at the moment is the little desync bug. But I'm sure thats an easy fix, so my ratings weren't at all influenced by it :)
I honestly don't have much critique to give, its a very good game. Would work really well as a mobile with either swipe controls, or just two different buttons, up & down.
Some updated art, a little more juice, and some more reasons to play (highscore? collecting coins as well?), and it would be a pretty complete little casual game!