lol i don't think you understand what no means
lets get something straight here, this is a free game. If you're not happy with it, well tough luck, it's not like you paid for it and it didn't deliver on what was promised. You're entitled to have an opinion, but it doesn't make it right. Would it be cool to have multiplayer? Sure! Is the game still amazing without it? Yes! Did the dev already explicitly say no several times? Yes! So maybe instead of lashing out at the dev like a child, you should show them some support for all the hard work they do. At the end of the day it's your social skills suffering, so do as you please, but you will not keep friends as you get older if this is how you talk to people. Grow up.