Puzzles
Interactive tiling puzzles and pattern challenges

Nessies
A whimsical monotile tiling puzzle with water-like shapes

Nessie 2
Generalized tiling with different polygon shapes

Cipra Loops
Barry Cipra's loop-tracing tile puzzle on a torus
Celtic Knots
Build Celtic knot patterns by placing tiles on a grid

The Ormat Game
Cover the coloured squares and none of the blanks, with as few overlays as you can