I like this a lot! It was strangely addicting, even though I don't like billiards lol. The weird water physics definitely make it a lot more engaging, and it's fun how you're playing against an AI.
In terms of feedback, I think it'd be a good idea to add a trajectory line or something like that. Just some sort of aid to know exactly where you're aiming at while moving the camera, because it's difficult to judge correctly sometimes.
Great work!