Kuku Kube Game |Kuku-Kube|

What is it?

kuku-kube.com is a color-difference challenge: click the tile whose color differs slightly from the rest. Boards grow harder as differences shrink.

How to play

• Click the odd-colored square each round
• Climb levels until differences become hard to see
• Take breaks; screen calibration affects difficulty
• Browser eye-test toy; no account