such as Arcade, Mission, Shuffle, and Skin Edit mode. Arcade mode is designed for mobile phone ports; players complete a total of 20 stages with CPU versus battles serving as Boss stages after a certain amount of stages are complete. Arcade mode also adds blocks that can explode, a third color block within certain stages, and new grouped block shapes such as S-shaped or three-block-wide rectangles. Mission mode offers a range of challenges such as clearing the stage in a certain number of moves or clearing a specified number of columns. Shuffle mode creates game sessions with a randomized order of stages. Skin Edit mode allows players to customize their game session by selecting the order of unlocked skins. Development and release Lumines: Puzzle Fusion was the first game developed by Q Entertainment with Tetsuya Mizuguchi as the designer. Mizuguchi was part of the studio's founding following his departure from Sega after they dissolved United Game Artists, Mizuguchi's previous venture. It was developed by six people in a year. The game was 75% complete when it was announced at the Tokyo Game Show 2004. When he first learned about the PlayStation Portable (PSP), Mizuguchi was inspired to make a puzzle game with music for the device, which he described as an "interactive Walkman". He considered it ideal for his game because it was one of the few handheld consoles to have a headphone jack and high-quality sound. To attract casual players, Mizuguchi wanted his new game to be less daunting to play than his earlier titles Rez and Space Channel 5. Originally, he wanted to make a music-heavy Tetris-style game but problems with licensing led him to create a new concept. Mizuguchi did not consider developing games for the PSP difficult and began working on the game before any PSP software tools were provided. The game's title was derived from "Lumine", meaning to illuminate. The subtitle "Puzzle Fusion" is intended to reflect the mixture of music and gameplay. The prototype was initially developed on a personal computer (PC) running Microsoft Windows with the specifications of the PSP in mind. During the prototype's development, Katsumi Yokota was mainly a graphic designer and illustrator, and considered himself an amateur music composer. He purchased several PC software packages, including FruityLoops and Cubase to assemble loops of electronic music, and Adobe Photoshop to create the visual graphics. Yokota learned about using sound effects while