Fifteen Puzzle: Match the Color Game

The game "Fifteen Puzzle: Match the Color" is based on the classic Spots, but the rules are slightly changed. The game involves 16 round balls, which are divided into 4 colors: yellow, blue, red, gray. As in cheerios, you need to move the balls on the squares of the square playing field. To win, you need to collect all balls of the same color in each corner.