Master of Donuts is a fun and addictive sorting puzzle game. Try to sort donuts with delicious topping in stacks until all donuts with the same topping/color are on top of each other. Challenge and exercise your brain and get relaxed before or after a busy, sunny or perfect day and become the Master of Donuts. donut puzzle,sorting game,brain training,stress relief,addictive game,color sorting,topping matching,puzzle game,mobile game,casual game,relaxation,brain exercise,master of donuts,online game