This looks like it's going to spiral into development hell. It never ends well when the devs scrap the old game and attempt to rebuild it because of how much they've learned during the process of making the game.
To all the future game devs, don't do this, it's a mental trap. Just finish your game as good as you can make it with what you've already built. You are constantly learning and improving, so at some point in this next build you'll decide you're unhappy with what you've previously built... again, and you need to start over... again. This literally happens ALL the time.
Finish the game, and then take what you've learned and apply it to the next. Obviously it's too late here... and for the hundreds of other porn games (and non porn games for that matter) that have succumbed and will continue to succumb to this. But future devs please take heed.
If it was a matter of unsustainable code due to lack of knowledge at the start, you should be refactoring, not rebuilding. As tempting as it is to torch it all and start over. Refactoring is how you learn how to code well.