+ +<-1 (portal)
/o/
/ + 3
+ /
/ + v
v /o +
+ +o--+ | /
o\ | |o
+ + + | +-o+
o o |
+---+---+o-+
|
|
+----+----+ + +
| o o o
| 2 | +-----+---+
| ^ + | v o
+ \ o +o--+ + / +
| + |/ ov
| / + +-o+
| +--+
|/
+o->+
1 = Portal from Mega-Maze First Floor {30-45}
2 = Mega-Maze Basement (Part 2)
3 = from Mega-Maze Basement (Part 3)
Here is the universal key.