Best puzzle game of this type I've seen incredibly polished and responsive.
Only two issues:
-The angle you look at the board is 45 degrees meaning that its unclear in which direction which button takes you: "Will W take me left up or right up?" - me a dummy thinks for the 3rd time in the same level
-No next level button so you need to waste 2 seconds watching the sweet transiton to the level select.
Outside these two issues its perfect.