This game has been in development now for around 10 years and they have managed to get to a stage that a single developer could have done in around two weeks.
It's a great example of the perils of Early Access. This is so early in the development cycle that it shouldn't even be allowed on Steam. There isn't a 'game' there, you can only punch and suplex and there is no way to lose. There's no sound, there's no wrestlers outside the two models, there's no movesets, there's no competition.
It worries me when people purchase these types of things because in most decent Early Access games if everything falls apart you still have something for your money even if it isn't complete. Here the game developer is attempting to panhandle and I question his motivations for doing so.
It sounds to me that they cannot afford to develop any part of the game and don't have the proper expertise within the team so are using Early Access funds to get even the very basics developed by hiring others.