Turn the tiles. Close every line.
Tap tiles to turn them until every line meets another, then watch the picture bloom. 290 boards in ten worlds with twin gears, two-colour water and honeycomb hex packs, a new Daily board, a timed Loop Rush leaderboard, a shop and trophies.
Turn the tiles until every line meets another line and nothing is left loose, and the picture lights up. Tap a tile to turn it clockwise and long-press (or right-click) to turn it back; in Flow packs the water must reach every outlet, twin gears turn together, and in Loop Rush you light as many tiles as you can before the clock runs out.