This is a very good game indeed. Somewhere it is a little glitchy, but overall a very pretty and well-made game. A expansion with more levels and some corrected glitches would make this one of the greatest flash puzzle games :)
Somehow the mouse-capture is quite faulty, and nothing happens when you "draw a line". Also, when accidentally drawing a line outside the flash-screen doesn't trigger an action. This is a problem, when all enemies appear at the edge of screen.