Review!
I think you did nicely with this one. It's a game which can be addictive, yet horribly frustrating. But at the same time, with a little something that makes you think ''okay, it's not THAT hard''.
I mean, when you start getting the 'tricks', doing a "2 for 1" shot, or most planned shots, it starts getting funnier.
Something you could "fix":
When you lose the game, you get the game over screen, then the "submitting..." screen. i think that last thing takes too much time (since you may be wanting to play again). and it could be more like : "Game over, submit your score?" (since i don't find an use in submitting like 4 points).
Too bad i wasn't able to get to the state of Zen, my max was 17, but i may revisit it someday.