Managed to create a map that I'm fairly ok with. Its a bit rough but it should show the basic layout of the dungeon as it is now well enough.
This text was taken from Royal Road. Help the author by reading the original version there.
The colours are a bit off in some places since I had to make do with pre-made building blocks from roll20.net
In the ideal situation, would all of the corridors and rooms have an icy texture but this was currently beyond me.
I think I got most of the proportions right, each square is one metre and should thus give you all an idea of how the dungeon currently looks and how big it is.