Lost me on the second set of stairs...
The first part of the route is the same as the path to Level 1.
After you warp from the Lab, you want the next warp in the south. I think its the only other one you can reach at this time.
After you warp there, go as far north as you can. To the east is Level 1, you want to go west here.
Follow the way west then south as far as you can. Warp here.
Going north, you will pass the first ladder, or stairs. Keep going north to the next one.
Go east here, then north. You should be in a place with 3 paths going east. Take the middle one and there is Level 4.
If you still need help, I'll PM you a more detailed route.







