Would you let goats climb these structures?

We just got 4 Nigerian dwarf goats.

I’m trying to figure out what to build for them to play with/on.

The chicken coop/ goat shelter will be able to support their weight, but I’m not sure if it’s a bad idea to build steps for them to hang out up there

Not sure if acidic pee and poop will be bad for the roof or if hooves can cause damage.

Also not sure if the angle is too steep and they may slide off.

The goat shelter is the cheapest quality metal roofing available at big box store.

The coop roof is slightly higher quality.

Thanks