Thanks so much! And I love the read of the circular logo as a d6 in the corner of a room - I'll admit that was unintentional but saw it as soon as you pointed it out, and it's a great extra level to it!
Overall was trying to go for options that would be simple/not distracting (so easily matched with any genre of book), but also immediately identifiable - so I'm glad you think it would look cool on a cover!