Hmm... well 2D people somehow eat without problems so... idk @_@ I would assume that they just have the 2D form of a digestive system if that works somehow... @_@
Depends on if you are talking about cartoons, or if you are talking about an actual 2D universe of sorts. Everything would have only two dimensions so things like mass probably wouldn't work. :P
Theyre not done with the update yet... Theyll had a bar at the top with the notifications and stuff but they found it was slowing down the site so they temporarily removed it..~