Well ... I've gotten feedback from multiple people who successfully ran it solo. Daniel from Dungeon Dive even covered it in a video.
Having said that it's a fairly standard zine, meaning it isn't written with solo play in mind. However, many rooms are filled with random tables, like the "room of many doors" on the second floor, which is a spread filled with random generations. So I can understand why playing it solo shouldn't be an issue.
Lastly, I've gotten something more exciting, since you're looking for solo play. I'm about to launch a Kickstarter for NECROVENGE. A standalone solo game, where you, as a failed necromancer, set out to get revenge on whoever wronged you. Recruit minions, build traps, arrange weird ceremonies, and rebuild your dungeon, while trying to survive attacks from kings, queens, and that lunatic from the neighboring town – Bert. Before at long last getting your well-deserved revenge. I'm super excited about it!
If you have further questions, hit me up on Discord, Twitter or Facebook!