Certainly I am working on the 'missing doors' thing - which is the same problem as the 'can't pickup items'. If zombies aren't dangerous I found it a bit boring? I would like to do building but I think people would build too much for the 3DS to handle? (online anyway). I think it should save when you die, even if you quit, so it's perma-death but I understand not everyone would be happy about that change because they like the exploit :(