An awesome idea! Salt isn't something I think I would have ever really considered so its something I'll look to grab for a different idea!
At this stage some of the items are probably already listed. I think the main improvements could be on layout/information design - some things maybe to consider:
* I don't know if the salt table (weights etc) holds enough value for the real estate in the module
* The foghouse seems more like a design of a real location, rather than whats needed for the module to shine. I'd consider making it smaller and only include the elements that will value add to running the module.
* Readability will be improved with padding from the edges of the boxes
* The suffocation curse - I feel like this would actually be quite prominent. On reading the words, i went looking for a box describing it! I think it would value from being part of a larger overall box with both the rules and curse.
I would also strongly consider suffocation as one of the key content warnings on the front page. Its specific enough and likely a trigger for enough people that it would warrant its own callout