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.