Gungaroo
Gungaroo - First Passage
End door - stop moving in front of the door to make it open (full stop).
Gungaroo - Room 2
From the start, work your way left across the acid, and climb the blocks. There's a red crab mech. Your goal is to carry this into the final room of the stage, spawning the blue mech.
Gungaroo - Room 3 Wall room
Gungaroo - Final Room
The goal of this room is to destroy mechs until the boss appears
Collectables
There is a Sub Tank on top of one of the pillars
There is a Heart Tank on top of one of the pillars
Blue Mech
The blue mech is superior to the red mech. It only appears if you enter the room in the red mech from Room 2.