So, I played Havendale with a halfling monk, and the floor tiles were all black, but I went on anyway (it was really surreal). However, when I exited, this weird error came up, but it didn't seem to crash the game:
Yup, that's the browser running out of memory while loading your existing Kingdom. From memory. This same code runs every other time you come back to the Kingdom from a dungeon run and works fine...
Really looking forward to Unity getting back to us on this.