Attack of the E's!

As you wander into town, you notice its entirely deserted.  Cars and houses lay abandoned, with weapons strewn about showing signs of a battle. Then, you see something approaching from the distance. First, you only see one, then two, five, and soon there's an entire swarm of them! With only seconds left, you brandish a pistol and prepare for a fight... "Attack of the E's!" is a 2D shooter where a…