This android app is a perfect treat for people who thrive in tic-tac-toe and would like to try on a new challenge. It's called Sun Triangle and the premise is very simple. All you have to do is connect three suns to form a triangle in the middle. 

It doesn't have to be a perfect triangle all the time because it can be isosceles, scalene, acute, right, and obtuse. As long as the lines won't cross or overlap with other lines, you're good. 

You gain a point each time you create a triangle and the same thing goes for your opponent. The game will end once there's no more triangle to make. Whoever scored the highest will win in the game.