Ball Sort

It looks like simple ball moving, but the real fun is planning ahead: you must clear top layers to free the colors trapped underneath, use empty tubes as crucial buffer space, and make smart transfers that keep your options open, and when the same-color balls finally stack together and clear as a set, the board turns from messy to perfectly organized in the most satisfying way; with more colors and fuller tubes in later levels, every move matters even more, making it calm, brainy, and surprisingly addictive.