a friend system with a cool interface
all steam friends wil be automatically added to you're friends list.
you can visit their universes and you can invite them to your world, and let them build
if you meet other players, you can use rmb this wil open a little menu above their head, that menu incudes: mute friend invite trade battle visit etc.
Kim Lambrechts commented
*to go to you're friends press F or use the menu in the upper left corner*