It seems this is some kind of prototype which isn't finished yet but was preserved. It is remarkably similar to Blue Knight Berserga planned by the designer of this game.
Controls:
DIRECTIONAL: Move
SPACE: Fire long-range weapon from right arm (Gun's Level)
SHIFT: Fire short-range weapon from left arm (Blast)
ESC: Pause & Player Stats
Panels (content is fixed per room):
GREEN: In-Game Info or Enemy ID
PURPLE: Increases or decreases player stats/energy, revives an enemy in the room, lights up room, or removes all the walls in the room
WHITE: Unlocks doors in the stage (sometimes only after defeating all the enemies first)
Map: Player & Main Enemy Location
Energy: Used by weapons, regenerates over time
Status GFX: Health (Head, Left Arm, Right Arm, Body/Legs)
Ending credit:
Game design
Masatoshi Kondoh
Massayuki Nakamizu
Programmer
Masatoshi Kondoh
Saitoh
Character design
Sei Ogito
Music composer
Nakagaki
Ryuichi Kandha
English interpreter
Nakagaki
Scenario scriptwriter
Karamoto Ofusa
Debugger
Masayuki Nakamizu
Toshiaki Kusakabe
And special thanks to...
Naoki Aoki
Katsumi Ogawa
Takashi Yoshida
Chizuru Yoshida
Tamura
Ehten Komotta
Black Point
Hiroyuki Hataike
Takano
Akira Chiba
Kaku Koike