Wow, I just realized Vast Fame did compose its own soundtrack, except for Dr. Meet Map and Stage 2, which they are modified for that purpose. Sounded great, wishing for four minutes longer than just one minute.
The soundtrack names needs to be corrected as the Robot Monsters (yeah these Robot Master Maverick equivalents are stated to be monsters according to the English manual for this game) have actual names as I've mentioned previously of the source:
Wagon Man's actual name is Abandoned Armored Robot - Associated stage's name is Abandoned Factory
Mermaid Woman's actual name is One-Eyed Sea Monster (the fan nickname sounds like a predated Splash Woman) - Associated stage's name is Water Control Center
Earth Man's actual name is Iron Golem - Associated stage name is just simply named Mine
Scorch Man's actual name is Fire Magician - Associated stage name is Volcano
Rose Man's actual name is Tempest Plant Monster - Associated stage name is Robot Forest
Frozen Man's actual name is Ice Medusa - Associated stage name is Frozen Base