Downloaded Chrome and it still crashed at the same spot. I don't know if it's relevant but the console shows this right when you select an option.
2index.js:459 res://Scenes/Dialogue Balloon/balloon.tscn
I dunno' if the "2" right before index.js:459 means it's trying to load the same thing twice, but it seemed like the only line in the console that showed that little number in a bubble just to the left of "index.js:459".
Best of luck with the bug squashing! Seems like a very fun game!