There are 90 levels. I've done the first 22 which fall under the categories: Kids, Beginner and Easy. The next batch are: Medium, Hard, Very Hard, Expert, Crazy and Impossible.
Memory mode: see the blocks move and memorize the solution
Challenge mode: create your own puzzles and drive your friends crazy
When I first played Make Me Blue, my initial thought was: reminds me of Head Spin, another puzzle app that I reviewed June 9, 2011. Head Spin was just a 2x2 grid and the objective was to get the head face forward, right side up. Damn good puzzle game. Unfortunately, it's no longer available on the App Store.
And that's okay, because Make Me Blue is essentially the same, but with more features.
Great job Freek!