This is sprouts, a pen and paper game. You take turns drawing a line between two dots and then putting a new dot in the middle of that line. If a line has 3 dots coming in or out of it, it is "dead" and you can't draw any more lines from it. The person who draws the last legal line loses.
It's very buggy and the crossing lines doesn't work, so this is just a concept. Also you might have to repress green flag to get dots to work.