There are 50 levels and I've solved them all. Which means they might be a bit too easy.
According to the Leaderboard, there are only 9 people playing Dots Pairs. Do Miguel a favor and download it, because it's free. He's probably spent a lot of time making the levels, the graphics etc. So many puzzle app developers experience this same thing: apathy. It's a good game.
Miguel: if you're reading this - get rid of the ads that pop up in the middle of the game.