Gridblocked

Gridblocked takes sliding block puzzles and adds portals. You push blocks around a grid toward their targets, except that a block entering one portal comes out of another, so a route that looks blocked may not be. The rules take seconds to learn and the later layouts take a good deal longer to untangle, which is exactly the appeal: a handful of simple pieces producing tricky consequences. Play it free in your browser, no download needed.

Casual