Change Block Color - centered

This game's goal is to change centered block's color to comming block's.
Small white or black block is comming to centered large block.
If comming block is black, then change centered large block's color by touching any where on screen.
If centered block is collided with same colored block then score will rise.
If it is collided with different colored block, then game will be over.
Change centered block's color according to randomly comming block's color.
Compare your score with other's in global leaderboard.