Simple to learn, but challenging to solve! Nice level design. Is there some time of minimum time between moves, though? I did have some frustrations trying to move quickly, especially in the levels with enemies.
The music is a nice touch!!!
If you want to move quicklier, you can click move button rapidly, then for every click you'll move one space.
Sorry if I wasn't clear, I am pressing the buttons rapidly, but there is still a delay between moves. It may just be on my computer, though.