The Million Musician Challenge 0.821
The Million Musician Challenge is a project to allow you to play music by playing games. The first game is a 2D vertically scrolling shoot-em-up game. The keyboard (qwerty or musical) controls an array of sprites corresponding to the music notes. As you shoot the falling sprites, you play notes corresponding to the music. It requires JRE 5.0.
Players of Valkyrie Invaders can now download a new song to learn using the game: "There's Music In The Air" (think civil war era march meets Coldplay). This needs four octaves, so you really need a keyboard to play it. The QWERTY virtual piano runs out of keys.
URL: Free Music Games