Regarding the graphics, seems like I'm not the only one on the dark side xD I love it!
Really good mechanic, I simply love it. Nice levels, had me thinking while not being hard to understand. Seems like I managed to drop life-module without restarting, but overall it's pretty polished game. The tutorial text could be a little closer to the center, it was sort of hard to notice when you're focused on the puzzle itself.
Overall, excellent job!