1) Yeah, I got that same feedback from someone else (@poltergasm)
2) Oh, ye. I forgot that i had to do that. I bundled it with gzdoom so it's easyer for people not-so-techsavy to know what to do with the wad file.
3) Yes. I have a beta version of Bob Omb battlefield and it took so long to make so i just used the same levels as normal doom as the prerelease in the jam.
4) I don't understand the question, Can you rephrase it? I think you mean how much levels there are? If so, It's just the first episode of levels of doom 1. E1M1 (Level 1) through E1M8 (Level 8). I didin't give much thought to E1M9 because it's a secret level, and not much people will get in.
5) You're welcome