How to play?
You control the bottom cannons.
On top of your cannons their are some buttons.
1- Press on those to shoot in coming enemies.
2- Shoot at the green bullets.
3- Dont shoot the red one or you will die.
4- Dont shoot the enemies cannons or you will die.
5- Dont let the green bullets hit your cannons.
6- Every 100 points unlock a new level.