I would say this much:

http://i.imgur.com/nqEGVA1.jpg bullets can pierce walls, dun worry they won't hurt you they're here only to tell you that lags have started

http://imgur.com/WOttp2l picking up stuff can get really annoying

http://imgur.com/h8chks2 no comment on this one

I really want to play this game but it's kinda hard to do this at the moment, so my only hope is that GH is already working on this issue.
(I put it in general discussion because i dun think it counts as a bug)