Thanks for the feedback!
1. I will work on the control issues. Hopefully, migrating to Ren'py will resolve this.
2. I intend to update by Chapters (similar to Telltale game structure) instead of by character routes. All of the "romanceables" are integral to the plot, whether the player dates them or not. Hopefully, I can pull this off.
3. The game focuses on relationships (romantic/sexual or otherwise). The explicit scenes come later as part of the story/plot.
4. The player needs to meet relationship score thresholds (different for each character/personality). You don't need to be transgender to enter into a relationship with them. Though some game endings are specific to this choice.
5/6/7. I had initially intended for the game to be free. But that might not be possible if I had to do this on Ren'py and publish consistently. So I will probably gather the feedback, size up the scope, and decide how to fund this project. Will be great if you knew where I could find/speak to reliable Ren'py programmers. Thanks for the advice!