[gwrqmyoe] Swipe input

The 2048 game elegantly took advantage of the swipe or fling gesture being very easy on touchscreen displays. The swipe action can be done anywhere on the screen.

What other applications could use this input style?  Origenless swipes (so only direction matters): 4 maybe 6 or 8 possibilities.  With an origin, then tracing a path among points.  There are 8 possible 1-stroke swipes along the edges of a square, possibly useful for chess input.  Octagon

There are 20 possible 1-stroke swipes along edges and diagonals of a pentagon, possibly useful for digits.