It's a pretty nice concept, quite well executed. The gameplay is addictive, the art nicely functional - hopefully you do well with it - it would be deserved.
Some observations:
At times it' s a little slow in menus - not sure if it's C2's fault or your approach (perhaps it's ads preloading?). Otherwise it's nice and fast.
The game field is vertical, perhaps make sure it's locked to that orientation?
There' s no way to exit the levels screen - perhaps add a button there?
It would probably make sense to have music throughout the non-game sections, not just level selection.
It seems to stay fairly active when in background, but I guess that's once again C2's/export system's fault