Not to be rude or anything, your game looks amazing, but. It would definetely be appreciated to have a game that everyone can enjoy, right out of the gate, on release, unfortunately, if Singleplayer does not come out in the voting period I will have to throw 1's around..
Oh you can totally play multiplayer, you just need a steam code at the moment which I can provide. If you don't have someone else to play with I can hop in a session with you!