Grrrrrrrr, got keylocked at Lv. 4 and your keys are 240 apiece :: sigh ::
Might want to lower the price of the keys in the 00 shop. This will realistically happen to people.
Edit: Scrounged up 240, beat 4. This is looking more like a puzzler/exploration quest so far, though the dungeon shapes do lack a bit of charm sad to say.
-James