The base can be purchased here: https://ko-fi.com/s/eb09e4b73e from animalcrazy
The adoptable the lineart is derived from can be viewed here: https://ko-fi.com/s/71e07b2f40

Played around doing a simple background then used the colourpicker tool to do a space-themed cat based on the background. Was my first time using a base, lineart credits to animalcrazy.