Milon's Secret Castle — stories left

Hudson programmer Toshiyuki Sasagawa handled the game concept, game scenario, character design, sound effect production and programming himself. Together with the 2 composers Takeaki Kunimoto, who wrote every track except the bonus stage music, and Daisuke Inoue, who wrote the bonus stage music, the game was made by only about 5 or 6 people even counting everyone else involved.

In the "Game Report Card" reader poll run by the magazine Family Computer Magazine,it scored 23.48 out of 30, as shown below.

In the "Cross Review" feature of the magazine Famitsu,the four reviewers gave 5, 5, 5, and 5, for a total of 20 out of 40. In the "Game Report Card" reader poll run by Family Computer Magazine,it scored 18.9 out of 30, as shown below.

Power Unlimited gave the Game Boy version a score of 83%; they noted the game lacking originality, but they praised its gameplay and graphics.

Sasagawa also took part as music producer and rates the music highly.

GameSpots reviewer Frank Provo described the game as one of the worst games, as he criticized the control scheme, giving it a "terrible" and score of 2.0/10.

Power Unlimited gave the Game Boy version a score of 83%; they noted the game lacking originality, but they praised its gameplay and graphics.

In 1996, a Super Famicom sequel to the game was released only in Japan, known as DoReMi Fantasy: Milon no Dokidoki Daibouken.

Milon made a cameo appearance in the Sega Saturn game Saturn Bomberman, and in Star Soldier there are hidden Milon tiles that can only be uncovered and destroyed for a 40,000-point bonus when certain score conditions are met.

In 2006, a Nintendo DS puzzle game was released only in Japan under the title Milon no Hoshizora Shabon: Puzzle Kumikyoku.