This was good.
ATTENTION: POKEMON HATERS -- I'm not giving it a good score just because I just so happen to like Pokemon, so don't flame me with messages saying "OMG!!! U GAV TIS A GUD SCOR B/C U LIEK POEKOMN!!1 LOL!!!" That's just a bias. >_>;
ANYWAYS, this had a good concept, but aiming was tricky. Plus, when I try to get one of the colored blocks on a lower stack, and there's a higher stack next to it with a different color on top, that square "blocks" it. ( I bet you don't understand that, but oh well. ) May I consider "snapping" the position of the ball? What I mean by that is make the ball move one whole column over, instead of just moving it over the blocks. Also, at level 5 ( or 6 ), I got introduced to the Master Ball ( ? ) without a window telling me that.
The music sounds okay, but I can barely hear it. Could you please try and make it a bit louder?
The ball speed at the start is a bit TOO slow, but that's just me. So I'm not going to say anything about it -- we learn at different speeds.
Overall, this was good, but it needs work done on it.