Gravity Game: Mission Save Planet Earth.

Aliens have discovered earth. Their sole purpose is to destroy and colonise the planet. You have been sent on a mission by NASA to prevent these aliens from invading Earth. You can kill an alien by shooting them with a fireball. Can you be the HERO Earth need and save our planet?

Controls : 
1. Drag the spaceship using you mouse to go up or down

2. Use Spacebar to shoot out fireballs to prevent the aliens from invading earth.

3. Score up to 100 by killing 10 aliens to WIN.

4. Allow an alien to hit you or go unharmed and YOU LOSE.