I love how the game has a little hidden x marks the spot for hidden secrets but for each I have found it always involved breaking blocks to get in. for some of the more dungeon ones it would make more sense if there was actual hidden doors as an object we can pick up perhaps even tie them to mechanisms that open them like a linked button or pulling the right brick for like stone bricks that fold back, or a book shelf that opens when the exact right book is interacted with, or grimverd putting items on pedestals that open.
Could enhance some fun having some puzzle like things to solve to earn secret rewards