I ran out of time during the jam so I wasn't able to test it as thoroughly as I would've liked...
The bug happens when there's too many clickers at a time and not enough clickable boxes (which I didn't think would happen when I was making it, but now that I think about it, would eventually happen in the later levels!).
But I'm glad to hear that it's fun! I'm inspired to fix the crashes+bugs to make a post-jam version (which I don't usually do) since people seem to like it!