some thoughts:

uncommon hat: lucky dice item should add a flat chance to start getting rares even with uncommon hat (start at 0)

thunderbolt would be much more useful if it did a lot more damage a lot less frequently

new rare item: crits do AOE

if playerprojectiles get too big, they get blocked by the ground before getting fired

uncommon damage item has the wrong description (+2 instead of +4)

the cards shown at the bottom left should display tome-modified values accurately