Production is crisp with a lot of ear candy as usual, makes me jealous every time 😄
The panning and falling bass stuff 1:37 was really cool, haven't really played the mick gordon doom game's that much but from what I remember of the soundtrack you got the atmosphere down nicely.
I'm not a guitarist, but for me the guitar work sounded great so no need to be too hard on yourself, if you want to hear bad guitar playing I can pick up a guitar and then you can hear what actually bad playing sounds like 😉
Can't really comment on the mixing since that's beyond my pay grade and everything sounded good to me. Do have to say I loved the punchiness of the drums, I always have trouble getting them to sound fat and punchy without over compressing them and losing all the dynamics
Good work!