Making a puzzle dungeon? Consider these resources.

Rich Lich by Gordy
Community
- Zine Month discord server - This is a creator-focused server which is active all year round. It's a great place to connect with contributors and ask all your zine and adventure creating questions. I'm also there for advice if you need me.
Theory
- Overview of OSR-style puzzles
- Puzzle Dungeon Design: Themes & Gimmicks
- Mastering the Puzzle Dungeon through Challenges and Lessons
- How to run a puzzle dungeon
- The Legend of Zelda puzzle box dungeon
- Design Your Locks With More Keys
Procedure
- Designing Dungeons: Or How To Kill A Party In 30 Rooms or Less
- Bite-sized dungeon design
- Cairn's dungeon seeds
- Cyclic Dungeon Generation
Examples
- Aberrant Reflections - Mirror mirror on the wall, what is that staring back at me
- Puzzle Dungeon: The Seers Sanctum - They're eyeing to meet you!
- Fabien's Atelier - Floating wizard island with a problem.
- The Door Locks Behind You - Rules and procedures for puzzle adventures with that Zelda flavor.
Assets
- Gordy's Public Domain Fantasy Art Pack 3 - This is where Puzzle Dungeon Jam assets are from!
- More of Gordy's work (also CC0) available on their itch page
- New School Revolution Public Domain Art curated selection
- Classic Explorer Starter Template - Simple and effective layout template.
- Yochai Gal's collection of itch art and templates