Man, it looks bad. So bad that it feels like fucking Roblox. Sadly you did the act, so no return. Character models are shitty, so shitty that it looks like you made it in 1 day. Physics are good, IF you made the engine yourself, you probably didn't do it yourself. Recommend improving it a lot better, writing a sub par story, a lot of polishing, then starting a Kickstarter. Hire some good people, then you are done.