This game is not purely skill, You also need luck as some of the tiles in later levels are hidden, so you have to guess. There is also no depth perceptive, so you cant know how many tiles are under a tile. The competition system is broken. I join a tournament, which is more than 1 day long. I played a while, collect some points and rank, and when I come back later to continue, it says the tournament is already finished and I am forced to take the prize of whatever my last rank. So dissappointing