Unblock It

A grid full of differently sized blocks, one marked piece that has to reach the exit, and only straight-line sliding moves to work with - it's the genre most people know from Unblock Me. Because each block can only travel along its own axis, a piece that looks like it's in your way might need to move somewhere else first before it clears a path. There's no timer, so the game rewards sitting with a stuck layout, and a hint is available if you'd rather not sit with it too long.