I'm very interested in hearing what kind of content could generate revenue or what characters you'd like to see. Any suggestions are welcome. o 3 o)

Futa on male and trap on male are definitely the ones that I want to see the most. Aside from that just a lot of switching, Firs being top most of the time but bottom some other times.

Either way your game looks amazing and I think it has a great future ahead of it, so I would recommend updating this page, since it lacks some information (changelogs I cant see, while I could previously. The page itself also looks a bit bland) but you got all the time for that kinda stuff. Just go at your own pace :)

Well, there are several characters that could be used in your game to do some fanservice or to be a key part of the story. 
In the past, I suggested RWBY characters because, in the end, you can use several of those characters to be in the background or to help you 
improve your skills or stats.
But it's just a suggestion, since you can use characters from Undertales or Deltarune, 
it's a way to ensure that people will play it. You could also include characters created by the fandom.
A good exampled would be "undertale yellow", which has characters 
that could perhaps be added to your game very well.