Microsoft Russian Square Plus! Edition - Bubble Matter

Microsoft Russian Square Plus! Edition is a rare puzzle game only available with the (now defunct) Plus! Pack for Windows XP. The game play wasn't anything special, but the music was very impressive: the game included 3 music tracks of different styles, each of which developed and became more complex the farther through the game you got, culminating to a rather intense ending. This is the second of the three tracks, "BubbleMatter", a trance-y, new age experience.