Tak Tik Tank

A huge space ship is comming down the sky. It looks nasty and ready to fire some thing explosive. But a big thick tank appear by a wrecked city. Lifting up it's cannon toward the space ship. And then they start firing, playing tic tac toe in the sky.

You will be surprized that playing just 3x3 tic tac toe can be so challenging and so hard to win. How far can you go when you are limited with angle and the speed of missile, is the point of this game.
The best strategy is kill your time or be killed.