Good LORD you put some work into this one! I had to skim over the clues and such so as to not spoil things, but the 4d4s system sounds super fascinating and your use of it as a investigation system is really cool. I love having all the results linked so you can sit and write in a digital journal and jump from result to result and the use of different fonts and such for the clues gives a very newspaper articles and strings feel to it.
I will say I’m not a fan of the main font, particularly when it comes to the rank pages. the Jack Queen and King feel hard to read. There are a few vector sets of playing cards on pixabay and Canva that might make a better asset to use so it is a quick and easy visual link from the card. Other than that the system seems super fun to run through, I’m just not a hundred percent sure multiple playthroughs will feel super different unless you fail or hit a moderate success the first time. Definitely added to my ever growing list of todos though!