Thanks so much for your patience with me overthinking this! From what I'm hearing from people who know better, it sounds like there should be zero issue with you adapting the gameplay system for your game. It would be great to see whatever you come up with, and if you would like to link back to this game (and let me know so I can link to yours!) that would be terrific. (The only thing that would require special attribution would be directly quoting the written text.)