There's a large grey structure that resembles one of the "circuits" you put "dots" in to open doors in the starting rooms. You reach it by going directly to the west of the first large room.
Putting dots into it doesn't seem to do anything, but if you go directly south from that structure you eventually reach what ive referred to as the "spaghetti structure"
there's another block there.
Additionally, if you position yourself at the upper left corner outside of the starting room, and travel north, you eventually reach another set of rooms almost similar to the ones you start in. I couldnt find a way inside of it, and there doesnt seem to be any circuits to open doors with...
Something noteworthy is that inside of the rooms you can see one of the weird ripply things that gives you an extra dot (like the one at the start needed to exit the starting area)
If it's possible to collect that, then it would be possible to fill in the constellation in the space area.
This is a very, very intriguing game