from the backer e-mail
That’s right: Procedurally generated dungeons. In this mode you’ll face a new castle every time, braving its treacherous (and massive) halls for loot, glory, and the simple, satisfying feeling of going where no Miriam has gone before.
Once you’ve explored its passages and defeated its boss, you’ll get a code that will enable you to share your randomly generated dungeon with a friend. (If you find a particularly hard one, you can even share it with an enemy! IGA isn’t picky.)