This is being played on the hotfix you released a few days ago. (I greatly appreciate you for making sure Bats are not carrying shotguns anymore! I also had numerous issues with that!) In the following images, I have ended up in a situation that I can more or less PROVE that your TF system does not even remotely work the way it is supposed to. For reference, this is the first floor of a new run, I'm still level 0, I maxed out upgrades, no equipment found. I had been running around for awhile then, and died to some cats like three times, and a bunny at least once. I realized that I was not transforming at all, and when I died again and realized a kobold had spawned ten spaces from spawn, and thought, "Screw it! Might as well let him kill me just so a cat can't!" Next thing I know, two Kobolds are spawn camping me, and I am mashing the spacebar. Ten deaths later, no transformations. Two cats and a mouse show up and join in the blood bath. Twenty intentional deaths later, still no TFing. That's when I hit the windows key, grabbed these screenshots, and made an itchio account to give you your feedback. Aside from how the game is obviously not working, I think another takeaway can be that, in the event this spawn camping business could occur with the stronger enemies on lower floors that would be impossible to take out even if you were trying to actively fight them, something should be done about it.
I will also assure you that this is by no means a first time occurrence, either. This is just the first time I was able to set up an experiment to prove the glitch existed, once I realized it had gone off again. In what I believe to be the same glitch, Last patch. I recall spending four floors stuck as a 85% cat, and another time there was this gargantuan floor where I was stuck as, so far as I could tell, fully TF'd bat, perpetually starving and not able to find or make food, unable to find an exit OR end the run, and repeatedly dyeing to bats over and over again because this was the patch they lugged shotguns around. I also recall both times being completely unable to force the requisite game over screen, or get the reduce curse spell to do anything whatsoever beyond wasting Mana.
Altogether, along with just some examples of just being really inconsistent and hard to understand in a way that does not feel intentional on your end, the main draw of your game seems to be fundamentally broken. And I do have some evil ideas on how to overhaul this system... I will try to talk about those at a later time, its midnight where I am, and that dungeon winds FAR AWAY from the realms of this bug reporting thread.
On another, unrelated issue, and I admit this might be an issue on my end exclusively but I figured I might as well bring it up regardless; something that happens consistently roughly a minute after I extract the game from it's zipped folder, my copy of norton protection will scan your extracted game and decide, "Assembly Csharp?! That can't be trusted, burn it!" If I attempt to luanch the game before that happens, it appears to run fine, even after it is auto-deleted. If I attempt to luanch it afterwards, well, the game does not run. So, I have made a habit of deleting all the extracted files any time I close the game, and running a fresh extraction any time I wish to play your game. Again, I don't know if there is anything you can do about that, just thought i'd bring it up.
That being said, I do applaud the fact you game saves progress in a manner that is not impacted in any way by uninstalling and reinstalling the game every time I want to play it. I was just curious if there were any plans to incorporate a "start new save file" option in the future. Moreover, or alternatively, I think you could consider allowing for the option to toggle already purchased shop upgrades on or off, so that you could play the game on harder settings without undoing your zoo/achievements/overall-progress.