Fun and simple game!
The graphics feel good. Even though they are just simple shapes. The game is well polished and fun.
One problem I found is that the VIP guests get in the way, and are impossible to deal with in some cases. One possible solution to this would be to be able to hold the Z key to ping pong between up and down, and when let go. The bat would fling the guests that way. This would give you much more control.
A very well rounded entry. Well done!