Great! Also, first time I read the word "bijective" in a TTRPG. Very well done. I think a variant could be: there are no Xs on the table BUT every time you roll another d20 and if the numbers match you get an unexpected paradox.
Haha thanks! I would love to hear how it goes if you run it that way! I wanted the few words to reflect the dangers of getting max or min on a dice by making the maximum time jump and minimal time jump inaccessible, a little narrative flair if you will :P Thanks for checking out the game!