I had heard of the game before, but the first time I saw gameplay of it was from a speedrun at ADGQ 2012. Speedrunner Funkdoc's playing the game (obviously..), and he's accompanied by a fellow runner Kareshi, who plays piano renditions of all the songs. Great watch, highly recommended!

Great game to watch, and a great game to play. It takes a bit to get comfortable with the controls, but once you do, it's an enjoyable experience.