That is super cool! I wish I could make my 2 goats something like that, but they are at our public equestrian center and it would make it look a bit like a junkyard. No offense, I personally think junk recycled and recreated into something like a goat playground is awesome, it's my dad who wouldn't fly with it. Plus, my goats would never use it because we would intend on them using it. If we didn't, on the other hand...
I'm certain they love that play area! Mine love to jump & climb -- more so when young. Since mine are full sized dairy, they tend to calm to just a walk up & lay down once in a milking routine. Need to be careful what they flop around...