Hello, answering your questions.
Yes, I am just one person, and I currently only have this project, which is Pleasure Hunters. Nano Nova did not receive updates because at that time it did not receive any support and currently it has not received support either, so I left it aside and even more so when I lost the game file. I did not follow Circus Playtime because I did not like it, I will not deny that it did help me a little, but I do not like using other people's models and there I used Cally3d models, so I was limited and could not do what I have in mind now.
Yes, it is the best option, I can make Nano Nova free, and only have this project. And sorry if you liked Nano Nova, I wanted it to be like a portal-style place but where humans were experimented on.
If you have any more questions, don't hesitate to tell me, I'll try to answer them in the best way!