You Must defend an alien invasion with your mechs, but the aliens have found out how to disable their weapon systems, so the only option is to use their self-destruct feature;

Manage your energy, which is drained by your actions and enemies reaching the city.

Last as long as you can and kill multiple enemies with an explosion for bonus points

Attributions:

Background Music: https://pixabay.com/music/video-games-spaceship-arcade-shooter-game-background-s...