Glad that you're enjoying the game, but sad that a bug crashed it for you. I've got a few questions - sorry if they seem really basic, but they'll help me narrow down the problem.
1) Were you playing with a downloaded version? There might be some logs I could look into for greater detail.
2) You're saying the storage screen was unresponsive, correct? You weren't able to move any of the inventory items or press Space to exit the screen?
3) Was this your first time this game in the "shadow cookie" room? (That's what I call the shadowy circle in this room.) Was this your first time on Day 11 in the shadow cookie room? If you were in this room before, did you access the chest?
4) Did you play multiple games of this straight, and the bug happened on a latter (i.e., not the first) playthrough?
5) Did you use any potions earlier on Day 11?