[Multiplayer - Incorrect software version]

Just download the openrct2 launcher on the download page.

(it's on the bottom)

[Multiplayer-Invisible game?]

Yea, or you just can port forward, so you can join each other for sure.
And you can make it in to a real server.
it's really easy did it in about 2 min.
Just open CMD, type in: ipconfig , and look for to default getaway addres (the one at the top of the page).
type your default getaway  adress in your browser, and search it.
Then you will come on your routers page.
The username AND password is MOST OF THE TIME admin.
there is probably a button that says portforwarding (or something like that).
The port you want to forward is the default openrct2 port 11573.
And don't forget choose both UDP TCP, And the targeted ip adress is your ipv4 (you can see it in the CMD)
Save it and you're done.

GOODLUCK.

[An option to delete save games in main menu.]

I really need an option that you can delete saved games in game.(main menu)

But thats the only thing i just really want, but the game is awesome.
And come on multiplayer AMAZING

What are you're thoughts on it?