Every four seconds colorful number will plus 1-10.
Red Square=1,Green Square=2,Blue Square=3,Aqua Square=4,
Tap them to make them plus equal to the plus part.
When right number will plus 1-10,when not then this round is over.
Number's color will change every second.
When aqua left 4 seconds,3 when blue,2 when green,1 when red.
If still confused you can press the T to watch tutorial.
Thanks for you support and wish you have a good time.