Patience Patterns released 
It’s logical game, the goal is to make all pieces in one color using chosen pattern. Pattern can be rotated, wchich make game more difficult. The goal is similar to Rubik’s cube, but moves are based on different mechanism. Only two colors, but hurts.
Available at Google Play store https://play.google.com/store/apps/details?id=gudicus.patience
I’m interested, if the game is REALLY difficult in your opinion.
Enjoy!