Somehow I managed to get to level 7, but my brain had turned to mush by that time. It's quite a challenge.
While it feels really great to figure out the solutions, more often than not, I find myself relying on likelihoods rather than actually being able to solve the puzzles with logic. I think the game could probably be tweaked to ensure that it's always possible with logic alone, although I have no idea how.
I think labelling tiles would be a little easier if the selected tile didn't change until the B button was let off.
It's a really cool concept. Is this based off of an already existing game (other than Minesweeper or Nonograms(Picross)), or did you come up with it?