Not bad. The gameplay is a bit rough- it's hard to control where the ball goes, and the character moves very slowly, which makes catching a misfired ball very difficult.
The ball also seems to hit the ground from a short height and be fine some times and not others.
The art is also a bit on the rough side, but is pretty cute.
The cat splat endscreen is actually pretty funny.
Overall, it could use a few tweaks here and there, but it has potential.