Both are decent point scoring puzzle apps. Of the two, I prefer Pushopolous. But I haven't played either in a long time.
The object in this game is to place the New Tiles from the bottom into the grid so that all the Positives match the Negatives. There are 3 grid sizes. I did the small grid & large grids and got 100%.
Interesting game, but it's definitely not the type to play over and over again.