Gyouten Ningen Batseelor - Doctor Guy no Yabou (Japan)

When you first load the ROM, you'll encounter a title screen and a menu entirely in Japanese. The standard layout for many Game Boy Color action titles places the 'Start' option as the first selection, so pressing Enter should begin the game. Movement across 2D stages is handled with the Arrow Keys, while the X key (A button) likely jumps or confirms selections. The S key (B button) is typically mapped to an attack or cancel action.

The core loop appears to follow a familiar pattern: navigate left-to-right scrolling environments, confront enemies, and reach a goal at the end of each stage. Some stages may include simple puzzles or platforming gaps. Since we lack verified details about specific mechanics, treat it like a standard action-platformer of the period: explore carefully, watch for enemy patterns, and experiment with both action buttons to see which one triggers your attack. Remember that all text is in Japanese, so trial and error with the menu items (especially the Select and Start buttons) might be needed to access options like save or continue.