Click the mouse on any alien object to fire a rocket from your fighter.
If the rocket hits the alien object you earn ten points.
If you destroy all alien objects in a level you go to next level.
If the alien object hits the earth the game ends.

 Click the mouse on any alien object to fire a rocket from your fighter.
If the rocket hits the alien object you earn ten points.
If you destroy all alien objects in a level you go to next level.
If the alien object hits the earth the game ends.

 {"fire": "left_mouse", "jump": "na", "movement": "mouse"}