After playing 50 hours and dying over and over I finally got uber lucky and was able to power my way to the 7th floor for the first time.
Got wrecked by who knows what so I had the brilliant idea to tunnel my way around the outside down to the next floor and sneak into the portal. Honestly I'm not sure if there is another floor I never saw the portal.
Ran into some big glowing red triangle thing that was neat no idea what it's about.
Shortly after that while trying to do my sneaky strategy a ghost worm didn't even know that was a thing shot through the wall and ate me. I'm sad, spent hours trying to make myself as strong as possible and it was all over so quickly when I got to new ground.
Oh well, it's fun but I need to stick to only one or two runs a day, grinding it out is driving me insane.