Drag a tile onto another one to swap them.
Tap a tile to turn it until the half circles line up.
Where two tiles meet, a large and a small half circle of the same color join into one circle. Close them all!
From 3 to 12 tiles, unlocked one by one. Several tile sets per board keep replays fresh, and many puzzles have more than one solution.
Simple touch controls that feel natural from the first move. A short hand animation shows you how it works.
Stuck? A hint moves a tile to its place and locks it there. Get more hints with a short video or a hint pack.
Optional color patterns make every color easy to tell apart, great for color-blind players.
Soft animated backgrounds and a little celebration for each solve. "Less animation" keeps the backgrounds still.
Fully offline and no account needed. No timers, no lives, no pressure.
Play in portrait or landscape, on Android and iOS phones and tablets.
Your progress syncs with Google Play Games or iCloud, with achievements in Play Games and Game Center.
Play in English, German, French, Spanish, Italian, Dutch or Portuguese.