Pro version has ads.
Starting from level 19, the game stops to open next level after completing the previous one. It scrolls you to their “internal” advertisement packages (buy our “Christmas package”, “summer package”, etc). So after completing the level, you need to scroll back to your unfinished levels (imagine scrolling from 19th level to 42nd). It’s frustrating because the scrolling takes more time than playing. And yes, I bought the “pro version” for 1 USD to remove the short videos which were shown after each level. Still can not play in peace.
