The pool is one of my favourite bits! Who needs the cold vaccuum of space when you can just lose all your money from the comfort of the bar?
You might want to take another look at the way horizontal spin is applied to the cue ball though. Right now it seems to add a curve to the cue ball’s trajectory (as if it were a bowling ball) – instead, it should just modify the rebounding angle off a rail or transfer the opposite spin to whatever ball it hits.