This is a really nasty little dungeon, in the best way. Chris is obviously channeling old school dungeon design and I can easily see ways to fit this into Tomb of Annihilation as a sidequest. He's not lying when he describes it as Legend of Zelda meets Hellraiser - the dungeon is a small maze full of locked doors and traps, with keys to collect to unlock the door to the final boss. The final boss who will kick your players' asses if they haven't been careful on their way through the dungeon.
I've been following the posts on Loot The Room that followed the writing of this adventure and it's been amazing to see inside Chris' process and look at how a product like this comes together. The fact that the finished thing is so much fun is just a cherry on top.
[5 of 5 Stars!]