Hoop Stack - Color Sort Puzzle is a free game for Android developed by BlackAtom Games. In this game, you will solve an addictive and infinite color sorting puzzle by moving the hoops on the stack. The goal is to clear all hoop stacks by putting a hoop on top of the same color hoop. The game requires strategic thinking and prediction skills to exercise your brain.

The gameplay is simple, yet challenging, with no time limit. You can move only one hoop at a time, and if you make a mistake, you can undo the step. The game offers infinite levels, making it an engaging and fun experience for puzzle lovers.

Overall, Hoop Stack - Color Sort Puzzle is an excellent game to pass the time and challenge your brain. It is completely free and offers addictive gameplay that will keep you engaged for hours.