Hello,
İ think it would be this game multiplayer.
It would be nice to play with Teamspeak or skype.
Need to be improved:
-Difficulty
-Night
-Natural disasters
-Armored blok (metal) for shark
-Powered shark or 3-4piece shark (or difficulty)
-In the other direction incoming items.
Sorry, i have a bad english. These are my suggestions, Good Games :)