Thank you everyone for trying out my game. I'm not sure what the issue with the promise button is. It works for me and for some other folks. I'll continue to troubleshoot.
The promise button breaks in the following case:
The user is allowed to click the text of the promise itself (next to the "re-roll" button). If the user clicks the text before committing to the first promise, the promise button will not work anymore, making the game unplayable.
However, if the user only clicks on the text after they committed to the first promise, this issue does not show up at all.