Ok, so this is a game where the Tetris is a bit upside down. You aren’t going to create solid line of bricks or shapes but you have to take away needed shapes.
If you want all the game modes available, you will need to pay but the free stuff is great as well. Enjoy the Puzzle mode where you have different shapes in every level. By taping or touching it, you cut needed pieces from the shape. Every move should be well thought to achieve what is wanted from you. The possibility to move back is neat.
There is even a second mode where decisions play the main role, you have to cut the pieces from „cluds“