Nice start.
I only got to level 18, but i'll give it another shot. Good music choice. I also didn't encounter any bugs, so i'm not sure what everyone else was talking about.
The only real thing I can suggest is a "Go to Menu" button when reading the tutorial or to restart the game from the first level. Because after you flip to the end of the tutorial, you have to go back the same way. Not a HUGE deal obviously, just noting though.
Good job.