In this strange music rhythm game, you play Gitaroo-Man as you go against various music themed villains. The game puts a new twist on music games as you not only have to time button presses but you have to move the analog stick around in a radar circle to follow a line that passes through the center point. You can play up to 4 players using the multitap and choose from a variety of characters, songs, and locales.
Even though the character's name is printed out as "U-1", and everyone calls him "You-One"... his real name is "Yuuichi". 1 is pronounced as "Ichi" in Japanese. "U-1" is a nickname given to people named Yuuichi in Japan, so this little detail is just a badly handled localization.