Okay, I just found out I f**ked up a bit. -_-

So here's the area layout, currently:

      01       07
     /          /
10-02-04-05-06-11-12
   /  |        |
03 09        08
    |
    v
   01


Er... my phone doesn't do monospace. -_-

01: Rings of Uranus ~ top-right (Hub), lower-left (02)
02: original ~ left (10), lower-left (03), lower-right (09), right (04), top-right (01)
03: (Cursed Warehouse T) ~ right (02)
04: (Flesh Zone: Gate) ~ left (02), right (05)
05: Meteor Hallway ~ left (04), right (06)
06: original ~ left (05), top-right (07), lower-right (08), right (11)
07: Cynthia's Lament ~ lower-left (06)
08: Waters of Mars ~ top-left (06)
09: (Origin Cave: Cursed Gateway) ~ up (02), down (01; one-way)
10: (Cirno Town) ~ right (02)
11: (Christmas Town) ~ left (06), right (12)
12: Uranus Cavern ~ left (11)

I hope this makes the layout a bit clearer, else I'll have to make some bizarre pic, haha. :p