I think this game is really cool, concept, mechanics, graphics. Yet for some reason I had a lot of trouble wrapping my head around how the mechanics work exactly. Even with the handy reference in the corner, I could not figure out level 2.
It's a shame there's no audio, but understandable.
Good game, I like the style a lot. It's decently polished as well, although a "return to main menu" option when you're in a level wouldn't hurt!