Similar to the classic Lines game, you can move a colored crystal to any free spot on the board. Then, more crystals appear. Groups of 5 or more get eliminated.
Click a tile then click on an empty space to move it. The path must be clear for it to slide to the spot. Place groups of tiles together so 5 or more of the same color are touching, and they will get cleared. Use the hearts to changing tiles to one color. Bonus points awarded if you can make the shape displayed.