Your AI ruins the game. Compared to the other games, you've effectively given it two modes: screw up the shot or do something unbelievably good. This comes down to doing things like getting out of a snooker and then snookering you on the same shot. And it's not a fluke: the AI does this stuff all the time. It ruins the game when it pulls of five really difficult shots in a row and then fluffs the easier shots. You get the feeling that you're being given a chance, rather than competing against someone.
Bad physics, awful AI, terrible controls, but you got +1 star for the prospect of titties. Then when said titties didn't materialise, you lost the star.
Alright. Can't actually score it zero, so I'll leave a derisory comment on here: don't give up your day job. I assume this isn't your day job, anyway, because this is so damn awful.
Let's clear some stuff up. In snooker, when you tell an opponent he has to play again, the shot gets reset. And when you're making a game, make sure the AI doesn't run like this: crap crap crap BEST PLAYER IN THE WORLD.
It's actually a neat little game, but it's ruined by things like putting your ball first and then waiting to the end, and then being given second place. Also, I find it difficult to believe that I can finish first, then click "end now" and the following players will still have a faster time than me.
Better your current score by 1 shot - when you go from, say, par to -1, play your mulligan. The cards will go back to where they were but your score will remain the same. Play the same move again and you'll get the points again.