Remove Donut: Color Challenge is an elimination game. If there are at least 3 donuts with the same background color, they can be eliminated. After eliminating a few, you will go to the next level, and the chessboard will also change. We have 3 props that can be used, the transposition prop, the shovel and the return prop. If you can pass 80 levels, you have surpassed 99% of people.