Sounds like a pretty good future for the game! For the price tag I would suggest since a lot of people like your game and would want to play it more when new bosses come out, make it around 5 - 10 dollars. That should be enough to put it on steam and get some more money afterwards. And it would be low enough for people to still buy it. But I don't really know your situation so do whatever you want, I am just suggesting :D I would probably buy it no matter the price tag because of how fun it is. Anyways keep up the great work!