I had never seen or heard of this game before this morning. The preview video looked interesting, and the gameplay seemed to have some kind of link to my own music (which personally intrigued me, seeing as how "Audiosurf," "Beat Hazard," "Melody's Escape" and "Symphony" are four of my absolute most favorite games of all time), so I got curious and went ahead and bought it.
On a first impression, the control scheme was a little unusual. I personally found the keyboard layout hard/impossible to use, while the controller setup was drastically easier to play with once adjusted to my own preferences, so I greatly recommend using one when you play this game. Think about how a controller would typically be configured for any flight-based console game, and you should be fine.
Now, onto actual gameplay and such. In a word?
It is like a flight simulator set in a cybernetic version of space.
The graphics and effects are absolutely stunning and beautiful.
You can adjust the enemies up or down to however dangerous you want them to be (so casual and hardcore players can both enjoy this game), or you can turn them off completely and just enjoy and explore the scenery while it pulses and moves along with your music.
There are wormholes that take you to different areas that you can continue to fight/admire the view in.
You can set up and save your own music playlist to use in-game (personally, I found trance music to be the best possible match for this game), and you can flip between the tracks at any time that you want to without having to pause first.
This game is a fun and challenging flight-based shooter for any skill level, and an unrivaled "chill out/relaxation" tool when needed. To be completely honest, if this game had Oculus Rift support, this would be the very first game that I used it on (if I had one).
Money well-spent here. Solid 10/10 from me.