Got to love a crab adventure! Seriously, though, there is some good stuff in here! Here is my feedback
+ CRAB PEOPLE - Carcinisation is a really fun mechanic to include!
+ well-written and evocative descriptions
+ NPCs are characterful and detailed.
+ Objectives and win-conditions are well-defined.
+ Layout is simple, but very readable.
- Location keys could use some polish, there is a bit too much fluff to parse key info at a glance,
- The infection mechanic is fun, but I feel like it could be a danger clock rather than a tracked number; it is a bit more manageable for the warden that way.
- Monster descriptions are a bit too verbose; key information could be a little clearer here.