[FREE][GAME][4.0+] Shades (review exchange)

Hello, everybody! I 'd like to present my latest game, SHADES! This game tests your eye-hand coordination and recognition skills.
This game is very simple with minimalist design, but not easy. And there’s a hard mode for those that have advanced brains.
Leaderboards let you compete with your friends, and achievements increase your Google Play level!
I welcome all feedback.


-If the background is black, tap the colored button that represents the word in the middle of the screen.
-If the background is NOT black, tap the colored button that is the same color as the background.
-Every time you tap the wrong color, 3 seconds are added to your time!

See how fast you can beat the game on normal and hard modes.

Google Play Link