This was from within the first month or so I discovered Cave Story, it started with a first person view of walking down an empty black tunnel for a little while before transitioning to an extremely low quality view of Cave Story, specifically an altered version of the first Labyrinth map

(recreation in Booster's Lab)
Quote came out of the left side. This whole part of the dream looked like it was from a 144p YouTube video, and it had no music. I didn't check the right side of the map, nor did I attempt to go through the door, but when I walked right under Sue, a textbox appeared with her facepic that had text, I don't recall what it said though. I tried to jump onto the platform where she was at, but it was just barely out of reach for Quote's jump height, and even then, there wouldn't have been any way to progress higher beyond that regardless.