Raze Flatpak Request

Project information: Raze is a fork of EDuke32 backed by GZDoom tech and combines EDuke32, PCExhumed, NBlood, and RedNukem in a single package.

Name: Raze
Homepage: https://github.com/coelckers/Raze
License: GPL v2
Upstream has been contacted: https://github.com/coelckers/Raze/issues/8

I made a prototype but need help