As a "fan" of stuff like cock hero, fap hero and the like this is awesome to see and play! Though I don't really like the more extreme stuff like slapping my downstairs area I do like the nippleplay aspects, maybe you could make it a choice to pick certain types of punishment and variations and such. Because I think the punishment adds greatly to the game as a whole but I don't wanna actually hurt myself lol.
Also maybe an idea would be to make a discord server if you'd like. Would be easier to have a dialogue and chatting about it. But that's just an idea. Love to see what the future holds for this game!