Meikyuu Kumikyoku - Milon no Daibouken

Meikyuu Kumikyoku - Milon no Daibouken (Milon's Secret Castle) is an action-adventure puzzle game where the player controls Milon, a boy with amusia (tone deafness), in a four-story castle named Castle Garland. Milon must navigate upward through rooms filled with enemies, solving puzzles by shooting bubbles at soft blocks to reveal hidden paths or items. Story: Milon enters the castle to rescue Queen Eliza and return stolen musical instruments from Maharito's invading forces. Characters: Milon (protagonist), Queen Eliza (rescue target), Maharito (boss), and Demon Beasts (Homa, Doma, Blue Doma, Red Homa, Red Balkarma, Kama). Standout mechanics: bubble-shooting for breaking blocks creates new routes and exposes shops; upgrade crystals from defeated bosses increase power; single-player exploration with lightning danger outside the castle.