The 12 balls might appear green, purple and red to you, but surprisingly, all of them are of the same colour - light brown. Optical illusion puzzles are one of the most popular things on the internet.

A bright multi-color fidget puzzle ball gets ready for a satisfying press moment.

Ball Colors in Yoku's Island Express ("baubles") allow you to customize Yoku's pinball -- and let you solve some puzzles. For instance, combining the Creepy Sprinkle and the Sweet Sprinkle you'll ...