First of all, let me tell you, what a fantastic job you've done on this game! I know it's WIP but I think you've done great work thus far and look forward to seeing more.
I also wanted to take a moment to perhaps mention a bug. I don't want to make you think it's anything huge and needs to be taken care of ASAP as I know you're working on the "permanently unstuck" route. But I just wanted to mention it in case it is actually a bug. So after a couple of nights (maybe 5 or so in a row) of reversing the transformation - the previous nights didn't reverse the effects and further than "Me" being connected at the legs and relatively normal sized - but after like the 5th night of choosing that option with like 15 essence or so, the text just stops. There isn't any more text coming after it, nor any difference in transformation. So I'm kinda stuck since I saved it at that point hoping a reload would help (though it did not).
This could literally just be that you haven't gotten to this point yet since it's day 16 or so. If so, then carry on, but if not, then perhaps this could be a bug.
Anyways thanks so much for this game!