Hello!
First off I love the premise of this adventure and how it fits within the jam theme, it is all very creative and original. I love the monster and the overall aesthetics of the adventure. I also really like the art! I really like the brevity of the module though I think adding a few more details, especially in how the creature changes, maybe a small table of some examples, would have been nice. I also think adding a little more concrete mechanics would help new Wardens especially. In that vein I also think adding a key to the map would be a good help for newer people. And lastly I think the combat stats on the monster and the guards is too high, and the number of guards, while realistic, I think would make it extremely hard for the adventure not to end in a TPK. Other than a few small tweaks and an editing pass I think this is an awesome adventure and one of my favorites that I've read. Great job!