A very nice game! Loved the humour in some of the levels, like a sequence of 5 cells that are filled easily and the last one that is hard. Great visuals, although being 2D they make navigating a bit difficult. Wish the cube moved a bit faster or recorded repeating keystrokes (I did this in my game, btw), since trying various paths in large levels can become repetitive and a bit tiring. A fun game overall, good job!