The object is to connect number pairs that will grow and grow. Hard to put in words. Look at the first image that says level 4. The 1 in the left will go to the other 1 and become a single 2. Then that 2 will go down to the other 2 and become a single 3. Finally, the 3's will merge to form a single 4 and you're done.
This concept is not new. About a year ago I played another puzzle app that was identical called Moskeez.
That's okay. Even Up has 125 levels. The puzzles are very well designed. The graphics are perfect and terrific.
The first 25 are 4x4 grids and are beginner. The next 25 have the same grid size and are novice.
Those are followed by 25 Intermediate 5x5 grids, 25 Advanced 6x6 grids and then 25 Expert 7x7 grids. Many of these puzzles may have more than 1 solution. However sometimes it's hard to tell. I particularly liked the design of Intermediates 8 & 22. I'm almost certain that those have only 1 solution.
Right now I've solved 101 of the 125 levels. What's also interesting is that you can create your own levels and then share them. At the moment, sharing is not possible, but you can create them. I think everybody should create their own level - it will help you understand the process of solving.
Heads-Up: This blog will announce the Best Puzzle App Games of 2013 on December 30 and December 31.