Hello! Nice map, although at some points in the game some stuff essential to the progression are not so well visible (that table with the vault key).
I am stuck though. I gained Flash Band, but there is really no use for it. I have Cannonball, Bloody Heart, Enchanted Stone and Giant Gear, and I have used neither of them either and I really don't know how to proceed. I cannot go back to the starting zones past the first platform and switches puzzle, because I locked it out by clicking a switch and quickly standing on a platform before it submerges and couldn't get back up, so I let the turtle kill me and respawned at the stone.
I used vault key to open 2 vaults, I dug up 2 items with the gloves and I really have no idea what to do next, I even collected all 10 treasures so far...