Something actually playable created with Gamestudio 3D? Well done!
I was using the software myself some time in the 90s, but didn't get anything of note done. I still have the 3.5 disks and original manual haha. That was Acknex 3 though. I believe Wolfendoom is done with a newer iteration of the engine.
Anyway, good job on this one. It's a fun little nostalgia trip!