Wow, thank you for the killer review! Every weapon is unlocked because well... my level designer had to drop out of the jam and I ran out of time. I had big plans for the story and game progression that never came to fruition.
That said, someday in the future I will certainly make this a real metroidvania. Someday. My hope for this jam is to at least rank high in one of the categories, even if it's not the metroidvania one.
And for sure, I'm jazzed to check out your game!