Hi, there will likely be a SASS version of the themes in the near future where it would be a bit easier to set the colors, etc. I have some ideas about reworking the CSS a bit in general so I would like to settle on that first. At some point a visual tool for editing the styles might be available too but this is probably not going to happen very soon (unless someone else creates it).
We will probably add a donation button but first we would like to get to v1.0.0 and start providing official support and then we’ll consider whether to accept donations too.
Glad you like the script, BTW! 🙂