Finally got around to playing through this in full. It's a really weird game to even exist, there were a lot of basic ports of Doom to various consoles, but it's pretty wild how fully new this is. Despite using a lot of the same weapons and enemies, they're all remade from scratch and feel a bit different, alongside an updated engine and a completely new set of levels, this feels more like an alternate reality's version of Doom. I think the feel of the movement and weapons isn't quite as good as the original, but it's certainly not bad (at least playing on pc, can't imagine it's great on an N64 controller). The level design is mostly pretty good, there's a couple I disliked but overall I'd probably put it over Doom 2's levels but below 1's. The updated lighting and different enemies definitely gives it its own style, which I don't think I'd say I like more but it's a nice change of pace. Doesn't really hold a candle to modern WADs but it would definitely be unfair to expect it to, and it's definitely worth playing overall if you're a fan of the series.