Dungeon 2 ...
That said, I HAVE actually beaten it, it just slowly made me want to die as I blew hours into trial and error.
What do I have to do? I went to the first door, then to the other site with over 3 hoovering platforms. On the left site is a not function door, so I went to the right in the big building. Activated the lever on the left site behind the first platforming section. On the right room with the not functioning lever on the wall, i´ve found a wall glitch, where I can jumping from construction bow to another, through the edge of the wall onto another construction bow, but then I stuck. I always fall to death. The middle door in the big first building won´t open. -.-