I am not sure if I completed the game 100%, but I found the sacred robe, relic shield and relic sword, killed both spiders and defeated the necromancer, there didn't seem to be any resolution to the story?
The monster artwork is profoundly hideous, I mean that in the best way possible, bravo!
The dimensional mirroring is fitting for the duality theme I think.
I found the combat to be a bit too easy overall, I didn't die at all, but maybe I was just lucky in finding all the items straight away.