This is Slimy Sewers, Level 2. You have 9 eggs to collect. The items available to you are 2 Bridges, 2 Telewarps, and 7 Instant Rocks.
Climb down the ladder on your left and continue leftward. Place an Instant Rock in the pit you come to, letting you walk over to the ladder on your left.
Climb up the ladder on your left and collect egg #1.
Now drop two Instant Rocks over the right ledge.
Drop onto them and collect egg #2.
Drop off the right ledge.
Use the ladders at your starting point to get over to the right. Now climb up the larger ladder on your right.
Place an Instant Rock in the pit on your left.
Now you can grab egg #3 on your left.
Climb back down the ladder, then down the next ladder.
Grab egg #4 on your right.
Now climb the ladder just enough to get on the ledge to your left. There are two groups of slugs wandering below. Drop off the ledge when one group is moving left and the other group is walking under your platform.
Follow the slugs on your left, to the left ladder and climb down.
Head leftward. Grab egg #5.
Climb the far-left ladder.
Drop an Instant Rock off the right ledge.
Drop onto the rock and build a Bridge to the right of it.
Now get on the bridge and drop an Instant Rock to the right of it.
You should now be able to climb up the ladder on your right.
Build a Bridge over the egg on your left.
Get on the bridge and Telewarp down to egg #6.
Now Telewarp back up on the bridge.
Climb down the ladders to the bottom of the level.
Climb up the first ladder on your right.
Grab egg #7 from the top.
Drop an Instant Rock off the right ledge and drop down onto it.
Collect egg #8.
Drop down into the slug pit when one group is heading right and the other is under your platform.
Follow the group on your right and go down the ladder they pass.