About 1324 +
No time limit.
Start central number is 1,tap Red square.
Then 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 to the last square you tap.
If still confused you can press the T to watch tutorial.
Thanks for you support and wish you have a good time.