Fission

Created in three hours for Trijam 75.

Move with WASD or Arrow keys. Use your left mouse button to launch neutrons. Your score increases based on the number of enemy atoms on the screen. Careful! Every time you hit another atom, it fires TWO neutrons.

Here's the first two hours and twenty minutes of development:

I stopped using OBS after some crashes (my fault for bad code), but the majority of the development is there.