Suggestions

[autumn stirrup]

Firstly you should make the map show the other players, make gadgets work for both players and when one player makes it make it connect to both players, make storage silos conect betwen players, i think youre already doing it but make refinery conect between players, make it so when you buy a extra island like those ones in spawn conect between players. Edit: maybe make it so when you place a marker on the map every player can see it and each player can place on with each player having each marker as a diffrent color

[gilded plover]

[cyan narwhal]

[upbeat cedar]

That's just missing sync features