So You've Been Thrown Down A Well is a riotously strong 31 page adventure for Troika. It blends art and layout in a way that makes me think of Mork Borg, but it also maintains a strong, consistent Grecian urn aesthetic that looks stylish as heck.
Plotwise, you play as folks who have been thrown down a particular reformatory well and into an under-dark as punishment for your crimes. This set-up can make it a little tricky to integrate Well into an existing campaign, but it makes for an extremely solid party dynamic if you use it as a first adventure or a one-shot.
The book doesn't have a single dungeon map graphic, but instead plays like a choose-your-own-adventure, with different pages sending you to other pages, and the exit being near the beginning. This *should* be confusing, but instead it's completely intuitive, and genuinely kind of fun.
The adventure overall has a sort of humorous, carnival tone to it, but it's got danger and some body-horror in addition to wackiness (although when I say body-horror, it's basically just one faction, and it was way lower in intensity than what I would normally expect if I saw "body horror" and "OSR" in the same sentence.)
There isn't a lot of insta-death, and the stuff that could swat the party like flies largely chooses not to, but there is a significant assortment of monsters and hazards. Everything is flavorful and extremely well-illustrated, and there are almost always diplomatic options in addition to combat.
Basically, this adventure is good in addition to looking good, and you should get it.
But if that weren't enough, it also comes with a set of wonderfully illustrated Troika backgrounds which spill over into a whole second supplement full of backgrounds. The supplement gets to step away from the urn aesthetic and do super cool things with color, and while like the adventure the backgrounds are all Troika-specific, they can technically be converted to other systems, and they have beautiful art.
Overall, this is a phenomenal Troika adventure, and it may also be fun to play with Fate or another system that allows for easy conversions. If you need a harsh, unrelenting tone in your adventures, Well may not be for you, but otherwise it's pretty much the perfect Troika intro.
Minor Issues:
-Page 7, Shrimple, this points to page 18, but page 18 has a Shrimple Invader which has completely different stats. Also, the Shrimple on page 7 has identical stats to the Ogatcha. Is this intended?
-Page 12, "use the", this paragraph trails off abruptly. Does it connect to the other side of the page?