Just finished playing through this. The music in this wad is amazing, well done @AD_79.
Besides a couple of small things all the maps were enjoyable.
Not sure if I'm just too dumb to figure it out but it seems like the invuln secret in map04 is not reachable.
Map06's invuln secret was annoying since it relies on shooting a wall that looks exactly the same as everything else.
The only gripe I have with monster placement is that some of the mancs are positioned in hard to shoot places (very high up) which makes cleaning a couple of the maps annoying for uvmax (especially the large area in map07, map09 and map32).