I love how no one has ever complained about the layout of the dungeon in that pic(I know it has significance in Japan, but everyone knows that). Anyway, I never had much trouble finding where to bomb, it really just takes some common sense.

Edit: I think the manual had a picture in it that said what the theme for each dungeon was to help you. You could look for the manual online or you could buy a copy of the game at a flea market for $5.

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Yes the sig looks like crap, but live with it.
何者だ？ハア!名前なんか！