So what's the design philosophy behind your version?

[JordanPaoletti]

It seems any placement creates a green explosion which then fills everything with red.

[danielemoro]

Yes, but try putting it on max speed and waiting a few minutes. Sometimes really interesting patterns emerge. I'm still working on making it more interesting, and I will eventually add more user control and some tutorial to make sense of all the colors. I just need a time machine to do everything :D