How to use: You should see a menu bar on the right side of the screen, hover over it and the menu will slide out! When out click on the buttons shown! This should upgrade your tank automatically! If you don't know what the upgrades do, press [T] twice/once.
I don't know why, but the menu will not work for me.
Do you know anyway i can fix it, Because every-time i click something on the menu it does not work.