Hey, I believe the game automatically crashes whenever you have either too much rerolls or too much mana.
I got the sorcerer and the dragon egg, giving me essentially infinite rerolls. I wanted to see how far I could go while at the final boss, but at some point the game simply crashed. I don't know how important of a bug this is to fix, since it's rather unlikely to happen, but it's definitely a bit unsatisfying knowing I can't win that 1k mana run 😅
(Can't be that rare I guess, happened to me again, second time today, this time I stopped before it crashed tho)