Does clicking Download work? What browser are you using?
No download gives me this. I'm on opera.
something weird is going on with your browser, try Chrome or Firefox
This is the result on Firefox. The world's don't even load.
wait for 5 minutes? It loads slower on phones, especially if you downloaded many worlds
No download gives me this. I'm on opera. 
This is the result on Firefox. The world's don't even load.