If you know what to do here, you can easily complete this level quickly.
Ice 'n' Easy Does It
Dan needs more information about the space station, and from that, you'll need the high mental energy build-up from the preserved, decapitated heads of the professors lying around in this area. (Don't ask how this works.)
You start out as a husky, and there will be three rabbits ahead of you. You only need to take out one of them and take it over, and once one goes down, quickly take control of it so they stop attacking you. Amazingly, you can't attack them and they can't attack you when you're a rabbit, so leave them alone.
There are two professor heads behind where you start. You'll be getting them later.
For now, go up the ice platforms. After hopping a gap, you'll end up in a more vast area with an igloo. This is where things start getting interesting. Before you go over there, though, go further to the right for one of the professors' heads. You'll have to backtrack to get back to where you were to enter the bigger area, but that will get one of the heads out of the way.
Once you're in the igloo area, you'll have to deal with three walruses with skis for legs and hovercraft engines at the rear. They can also fire missiles. If you fight them now, you will get decimated. Instead, head over to the igloo. Nearby will be a rabbit encased in ice. Use your thump attack with the B button near the ice cube to break it. This bunny will have a helicopter rotor on its head. Take control of it. You'll be able to fly by holding A and drop bombs by pressing B. Stay directly on top of the walruses and drop bombs on them, and watch out for the missiles. You only need to destroy one to complete the level, but if you destroy all three, you'll get a trophy for it. It will appear near the igloo.
As the heli-rabbit, do not run into walls while flying. You will take damage. Fly back to the start and go to the area over on the other end of the bottomless pit for a second head.
Head back to the igloo area and take control of a walrus. There is an area with a slope, a small pool of water and a ramp. The walrus has a turbo boost that can be used by holding A, and can fire homing missiles by holding B. You'll need to hold A to get moving, but once you're moving, you can hold Up and then steer with the Control Stick. You can also move more freely in this same manner while on the surface of any sort of water. Just remember that the walrus can be a tad hard to steer and that it can slide around if you're not careful. For best results, tap the A button; you'll preserve your turbo boost this way.
Boost up the ramp to get to another Power Cell and the third head. You'll now be able to get to the exit teleporter in the igloo and complete the level.
Heli-Rabbit
Type: Heli-Rabbit
Environment: Ice
Skill A: Flight
Skill B: Bombs
Water Resistance: OK
Mass: Light
Armour: Light
Strength: Medium
Traction: Good
Fall Distance: Low
Production: Short
Engine: Kerosene
Intelligence: Medium
Walrus
Type: Walrus
Environment: Ice
Skill A: Speed Boost
Skill B: Homing Missiles
Water Resistance: Excellent
Mass: Huge
Armour: Medium
Strength: Strong
Traction: Very Poor
Fall Distance: Medium
Production: Very Long
Engine: Coal
Intelligence: High