Yes there's been a walkthrough posted SEVERAL times in this thread. Post 231 will probably be the easiest one for you to find. All other routes are quite easy to get by just failing at specific points.
A bit of a roundabout way, but you can take a random rpy file, copy it and edit it (with notepad or similar) and paste in the attachment code the dude posted.
We are actively developing assets for it, yes. It's one of four projects in the pipeline for 2025. And before anyone asks: The reason we can work on multiple projects at once is because each one has its own artist. That means I can write one project then move to work on another while waiting on art passes from each artist.
Good game with an interesting story. Hopefully in the second one we will get to spend time with the girls now that we have freed them and get to know them all better and have more sex scenes.
good work devs.