I did play the original, but basically completely forgot the mission. I died 38 times in my run, and completed it with 18s left on the clock. I will be going back in a few more times to try to flawless it before going for legend. Not sure I will try to solo legend though, Im not that good, but I enjoy the solo challenge in normal.
There are a lot of hidden paths, so remember which one to take without dying is a bit tough. Near the boss there is also a door which does not have an interact symbol, so just be aware of that when you get to the vault.
That's something I've gotten hung up on, no real direction is given. When I got to the area with the mad robot, I had no idea what I was looking for until after the time ran out. Then I remembered seeing a console in the previous room with a map of sorts showing what I assume were the switches I need to activate in order to open the escape door. Fortunately, I now have more of an idea as to what I need to do so perhaps I'll make it farther into the mission. 😬🤞
There is a different puzzle for the vault I think, using a screen with switches in order to get crafting unlocks. There is also one in the original tower where you shoot some symbols.