It's pretty tricky in general, but very good...
Seems to have a few bugs tho. If you are particularly bad at the tutorial (the spin one is pretty tricky), then the game crashes...I also found if I do the tutorial again having already completed it, it crashes also.
Also I found that sometimes when you hold a button and move the mouse to aim the shot, the bat doesn't move (usually it rotates so you can see when you are aiming) - that one is pretty major.
I bet it would work pretty well with a trackball...