This started off so easy that I thought it was far too easy, then the difficulty stepped up and it was better, but then it got super repetitive with moving things around. Now I'm above level 20 and I'm struggling, with my brain saying "Um, what?!"
This is a really great game. If I had more patience (or brainpower after this week...) I'd keep going. As it is: I surrender. Nicely done!