I like the game GeoQuest. It is a addictive quiz game. Currently I am playing GeoQuest beta. Colormania is also a addictive color puzzle game. Just download it and test your memory and guess the colors of the most famous icons of all time.
https://play.google.com/store/apps/details?id=air.com.generamobile.color...

Contact with me if you want help with any of the game’s levels. I know all of the Colormania answers. So I can help you.