First of all, thanks a lot, glad to hear you enjoyed your time with the game^^
As for your questions: For now I'm done with the game but I would like to return to the game in the distant future to add and adjust more things. There is a new project I am wanting to work on so that will have priority, which will be shared soon. I am currently in the process to setting the itch page for the game up. It will be a roguelite tf game. Whenever that new project is done I definitely would like to return to this game and add more stuff. There are serveral idea I had to cut, of which I would like to bring good ones back.
As for the bad endings, The reason they are so different are is mainly that I was experimenting with various styles on how to make them. The golden retriever ending was by far the longest one to make because of the extra art. I definitely would like to add more bad endings but they all would be most likley much shorter and simpler than the GR one. Or maybe their will be longer ones, hard to say currently.
As for remastering tf's, if a form feels to weak i definitely would adjust it, did that serveral times in the past. So if you have one form in mind that could need rebalance feel free to mention it.
In the beginning forest is a secret shop that gives hints on all the tf location, just bad ends have no hints.