Hey I had the same problem! But later I found out the X button opens up a shop, and with that knowledge I cleared it! great to keep in mind if u decide to play again
i've gotten into the shop, and even cleared out most of the dungeon, but i still haven't figured out a way to open to door -- do i need to clear all the enemies or blocks first? is there a key somewhere?
yeah, i do know about the shop, maybe i just suck at the game then lol. yeah can't open the door either, i guess you need to somehow make it so that you clear all of the blocks first like you said, i'll try that. still its very fun