You have a few possibilities to modify the sprite output and add fancy shader effects. The source code is totally hard-coded for now, so beware.

Technical info:
I just used the cellular automaton method (http://en.wikipedia.org/wiki/Cellular_automaton) to create a clean bunch of pixels , then i mirrored them in the middle to get a symmetry.
Use this tool in your next game jam for time efficiency or even better, integrate the algorithm for infinite game-play fun

If you generate an interesting sprite, please post it here, i'm curious about your findings.
Standard generation:

Glow:

Borders/Bloom:

Gameboy colors:

Github: https://github.com/PriorBlue/Simple-Spr ... ter/love2d