Heya, thank you for playing our game! As for the missing explanation between dice rolls and vendor items, that was definitely my bad. I completely forgot to show how the items were chosen because I was panicking over an animation bug.
The sum of the dice actually steps over each item, looping over, eventually landing on the Nth item. So, say that you have "Food Poisoning", "Herculean Strength", "Parrot", and "Quickfeet"; if you roll a 7 and starting at "Food Poisoning", you would get "Parrot"
The explanation is a bit too late, but hopefully this helps! We would definitely like to add more visual indicators for this minigame.