Thank you very much for playing and leaving detailed feedback!
About your points:
1) Running can be changed from keep pressed to run to toggle run in the controls settings menu.
2) Yes it does. Running while going up the stairs is the way to go.
3) To be honest, I wanted to keep my game as simple as possible, while retaining the basic DooM style. I love the BFG, but for the scope of my game I considered it was too much and the available weapons were enough. Instead of a chainsaw you get a katana (if you use the appropriate Hololive member cheatcode) as the alternate melee weapon.
4) It took me waaaay too much time to find, capture and cleanup the little bits of sound you get from all the Hololive members that have an easter egg in the game. Adding more would've extended my dev time more than I wanted to. Especially since DOOG is the first game of this complexity that I ever made. (And my third or fourth game overall if I count the little tutorials I followed to learn Unity lol)
I'm really glad you used the classic cheats! Those were one of the first things I knew I HAD to put in my game. XD
Once again, thanks a lot for playing!