The game definitely needs some work. The controls are okay, but they make the barrier jump to specific locations if you switch directions, and that needs to be fixed. Also, I would personally recommend changing the controls to have the shield follow the mouse, but that's not a necessity.
Author Comments
Project Earth Shield is a arcade style game.
Use the shield to protect the planet to earn points.
Earn as many points you can and try to get a high score before the planet dies.
'A' and 'D' control the shield