A nice mixture of arcade pool with the freedom to take a shot whenever you like.
"Classic game made new with smooth and challenging arcade action.
Aim from anywhere at anytime on the screen. Begin aiming your next shot as soon as you want. Cue slows down when you start aiming. Go for the target ball, shown under the pause button, and on top beside the next target. Use the target ball to collect bonus hearts and keep going strong."
The author of the game, Jesse Crockett, also wrote this article called Low Budget Game Development for Beginners, which is well worth a read to find out how the concept of Chill Pool came about, and how it evolved over time.