Mikey travels through horizontally scrolling areas and interconnected first-person rooms. The objective is to locate prisoners and key items, open blocked routes, and eventually complete the rescue. Doors lead to rooms containing enemies, treasure, tools, and occasional clues.

The player jumps over hazards, attacks with a selected weapon, and changes equipment as new tools are found. Progress depends on exploring both sides of the map, revisiting earlier rooms, and using items such as keys, bombs, and special weapons at the appropriate locations. There is one main adventure rather than separate selectable modes.

Map the connected rooms and note doors that cannot yet be opened. The game expects frequent backtracking, so remember the location of locked doors, blocked passages, and useful items.

Choose weapons according to the situation rather than spending ammunition freely. Search rooms thoroughly, collect keys and equipment early, and return to previously visited areas when a new item suggests a possible route.