Well, I’m a newbie with vim syntax files too, but here’s mine, along with my other vim-choicescript stuff:
https://github.com/Flurrywinde/vim-choicescript
For example, I made an indent file that seems to work, got folds to work, auto-detect the choicescript filetype, and auto-load some new vim commands that help when coding in choicescript.
I didn’t think choicescripters were using vim, so I was waiting until I learned how to package this as a plugin and make an easy-vim version. However, now that I know I’m not the only vim-choicescripter, I might as well put this out there now. Let me know what you think!