Nope, didn't need the walkthrough. My keen and penetrating mind can out-puzzle any flash game!
5/5, great story, good puzzles, not too hard but not too easy.
It was fun, and the atmosphere was good (amazing for a flash game, really), but the bosses were far to easy and there could have been more items to gain... for instance, a weapon that changes your fire spread instead of just upping damage. Or grenades, or missiles or something like that. It reminded me of Metroid... 4/5