FOSS gamedev and creative worlds

https://github.com/Kaceyproductions/xytest
there you can read the code and download it
Fully functioning code, but no textures
Sadly, i am horrible when it comes to them, so if anyone can help please do!

I think I'll make some textures.
Should they look more like default textures, XYcraft textures or what?
What size, 16x16?
EDIT: is xychorium supposed to be more like a crystal, iron-like,...?

Why do you open a new thread for this?
You can post it in the existing topic for the mod or the mod texture request thread.