Laser Gates

Laser Gates is a side-scrolling shooter. Failsafe detonators inside the computer have malfunctioned, and your job is to pilot a spaceship to destroy them before they explode. The narrow passage you'll need to fly through is well guarded. Your ship has a limited shield; each time you are hit by one of these enemies, the shield loses energy. When the shield's energy is completely gone, the game ends. (mobygames.com)