Your map is a trophy, proof of your familiarity with Metroid.
I was pretty sure that it came with a real map with the game. Legend of Zelda also did.
It was so long ago that I don’t remember if it did or didn’t. I do remember there was a map, but by that time we ( my family) memorized the pathways of the game. I think it may had been a Nintendo power magazine that printed it
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