Dude, This looks amazing so far, its like the predecessor to Robot Arena 2. You should totally get this up on steam, a multiplayer support would be amazing to see too, Cant wait to see what you do with this!
Multiplayer - We have people using Parsec for multiplayer now, but I think that is as far as we will go. Real-time dedicated multiplayer servers aren't in the cards unless we completely change the scope of the project, which would require a massive investment of time and money.
I can't give an accurate number, as I haven't done a multiplayer game before, but suffice it to say that without the support of tens of thousands of paying players every month, I doubt it would be economically viable.