Sort the balls into vials of matching colors. Click on a vial to lift the top ball. Then, click on another vial to transfer the ball. You can only move a ball into another vial if it matches the top ball's color in that vial. Each vial can only hold up to four balls. To complete the level, fill the vials with balls of ONE color. Balls with two colors don't need to be sorted, so just use them to move the balls around.

In some levels, there will be rainbow balls. You can place a ball of any color on top of the rainbow ball! Later levels will have obstacles to overcome. For example, there may be a gate blocking one of the vials. To unlock the gate, you'll need to make as many moves as the number on the sign says. Once you've made enough moves, the gate will unlock!

There are four buttons on top of the screen. The first button will reset the level, the second button will undo your last move (after your first use, you will need to watch an ad to use it again), the third button is to skip the level, and the last button is to add another vial to the level. To skip the level or add another vial, you'll need to watch an ad first!