In Vectron , your goal is to build an energy base by adding sections one at a time. You do this by moving your energy block into place and filling it with energy blasts. However, you'll need to defend your block against various enemies like Hungrees, G-spheres, and others who can destroy it.
To protect yourself, you can use energy blasts or special energy from an E-Pak to neutralize the threats. Make sure not to run out of energy, as this will cost you an energy block. With only three blocks per game, each one lost means a loss for you.