Hi! We don't mind if you do it, but we are working on an extended version (both in Spanish and English since those we published are only the background objects and some other ones mentioned at the game aren't part of the background list, due to localization some objects that are in the Spanish translation are not on the original game, and also we want to correct some issues). The work is yet to be finished since last year our life got a little messy, but it's there somewhere waiting us to finish it.
So said, feel free to use our published work since it is CC BY-NC-SA and use it as you please acordingly to that license. We'll be glad to know other people helped our work to grow and be shared!