Please don't end the series yet! You're so close to the ending!🙏 Going through Five Pebbles is an absolute maze. I'd suggest going back down the wall and such. Though if you need a passage (like the wonderer for instance), you probably just need to sleep in a shelter in Sky Islands. Don't worry, that red thing you bumped into in the memory conflux is able to repair itself (it's actually fun to mess with since there's no consequences 🤣) The daddy long legs looking stuff (the rot) is related to a failed experiment Five Pebbles did long ago in the timeline (you'll get more details through the Downpour slugcat campaigns). In Unfortunate Development, the zero gravity turns on and off here, hence the shuddering and vague noise ques. You can safely hold onto the blue viney things incase you're waiting for the right moment to float/move to the next pipe. But for your own sanity, don't try navigating Five Pebbles 😅
There is a second passage in five pebbles, where there are almost no daddies. You get there from another passage of the memory archives. The way you walked is the most difficult inside the computer, but shorter
The last dot in wanderer is probably sky islands You havent sleep there yet as far as I can tell also if you REALLY want to explore Five pebbles (even though there is not much of a point for you to) there is another path at 9:59 which leads to Non infected part of the facility of Five pebbles it is much more safe path and a bit fun fact The reason why there are Brother long legs in Garbage wastes were Five Pebbles tried to flush his cancer into the... "Garbage" wastes but they got much weaker overtime they cant hear anything meanwhile blue version of them can