Rapunzel Cat Tree

We have 4 cats who sleep and play in the tree every day, everything has worked fine with it but now it's starting to get a bit wobbly, and we can't tighten it any more like we usually can, but for the price I really can't complain. We couldn't figure out how the ladder was supposed to go so it's just hanging straight down, that's the only negative thing.

I bought the tree for two cats, each weighing 5kg. The tree's hideaway and platforms are a bit small for our cats, and the tree wobbles a little when they roughhouse on it. Otherwise, it's nice and so far seems durable. One of the cats likes to climb up along the "pole".