War of numbers

This is our next logical game which simple rules should be used with a little help of reason and a bit of luck.

Who are the players ? - The game is for everyone, small, big and the biggest ones, and for those who would like to prove themselves in our logical game which requires logical thinking and luck. If you are a parent and want your child to be fluent in addition, subtraction and logical thinking, this is a game for you.
There are 87 levels with one and two players mode on one computer.

How to play ?
To get to next level, you should score more points than your opponent. You take turns. As a player you can select numbers arranged horizontally between yellow lines and your opponent can select those arranged vertically between blue lines. A clicked-on number on a green box adds your points, a red box deducts them.