Move, sort, and match cards by color using drag mechanics. i found it tricky but addictive, especially when dealing with tight sequences and small misalignments on screen.
Dragging cards to build sequences is the main mechanic, with quick gameplay and no need for downloads, burst with simple controls and minimal graphics, which is kinda weird anyway.
Inside the game, you can click and drag cards, which is kinda weird anyway, and their interface is pretty simple, with no fancy animations, making it easy to access most devices quickly.
Quick to understand, this game rewards planning ahead; i found stacking same colors first then filling gaps helps avoid physics mess-ups, then you stay sane longer.
Cards and buttons are simple, with no fancy stuff, just basic sorting fun, which sometimes gets frustrating but keeps you coming back for more, lazy game design, really.