Play the online demo version.
It's a puzzle game with an aesthetically dynamic interface -- sleek, clean, minimalist color scheme. The object is to direct a photon beam via adjustable force fields in order to initiate various instrumental voicing simultaneously... and generate a symphony.
It's a festival of topology, visual arts, music, with physics references. Not much else I can ask for in a puzzle game!
The music is Hans Zimmer/Philip Glass-style hypnotic. In Act 2, the chord progression of i-VII-VI-V in C# minor works quite nicely with the elegant black background and bright particle beams. The visual and the audio together convey a sensation of cruising in space -- with an MP3 player and headphones.
I'm sorely tempted to get the full version of this.