This game was made with 3 devs and was made using techniques that take way toooo long. I don't think the current state of no online co-op is due to anything not working. Yeah each player's game will look *slightly* different, but overall it works. No, it isn't necessarily simple, but most of the people saying 'It wouldn't work' are ignoring that you can design games to be client side while sharing info on which enemies are alive/their positioning/their attacks. Yeah, you might have some weirdness at times visually, but that would mean the other player's actions can essentially be ignored outside of the damage they deal. To be fair, they could always implement client side hit detection.
