I thought that this game was cool when I very first tried it. It has different topics, and if you don't like the puzzle you are playing, but don't want to finish it to get to a new one, you can go to a different puzzle (on the same topic) with a click of a button.
Then when I logged out, the game gave me 12 notifications!!!! 12!!!! For no reason! I went back on the app and played it for a while longer, hoping that would solve the problem, but no! I still had those same 12 notifications. I deleted this app because of it.