Each of the games were created by Yoshitsuna Kobayashi and feature the artwork of Yoshiharu Nomura, whereas the music was composed by Tenpei Sato, a regular for handling Nippon Ichi games. Sato described Rhapsody's music as a "complete musical with both solos and choruses" and said "...it was a fun and refreshing experience."
The Marl games, similar to other Nippon Ichi video games, feature goofy senses of humor, tongue-in-cheek melodrama, and quirky casts of heroes and villains. Along with the humor, there is a certain level of girlishness to each game, the plot often focusing on issues of love rather than complex politics and demon lords. Each game also features musical numbers.
Each of the Marl video games, with the exception of the puzzle games, are role-playing video games. There are also a few musical numbers featured in the game, sung by various characters.
Little Princess: Marl ?koku no Ningy? Hime 2 was the second in the series. Musical numbers are also included.
Little Princess is also the first of the Marl series to be featured for download via the PlayStation Store in Japan. This version can be played on either the PSP or PlayStation 3.
Tenshi no Present: Marl ?koku Monogatari was the third game in the Marl series. The battle system recycles the traditional RPG one, adding the ability to have characters on the side lines, aiding the main party.
Marl Kingdom: Happy Hunt is considered a minor sequel to Rhapsody: A Musical Adventure. It follows a new character, Chocolat, who lives with her Grandmother Cocone in a wax figure museum in the Bavarois Plateau and tries to find her own prince with the help of her puppet friend, MIG. The players visit Mother Green, Panna Cotta Village, the Rain Festival, and a cooking competition to get the prince's attention.
This game has been long considered lost media, as the game disallowed replaying chapters- and was then lost completely when it was eventually replaced with previous games in the series.
