Very fun, addictive and easy to get into. It's not TOO EASY either, in fact....I find it rather hard at times. It has made me rage several times, and yet I still come back.
The controls are very simple and the screen itself doesn't fill up with too much information for you at once.
The concept involving waves of light is done very precise and the sensitivity of the mouse can be edited to whatever degree you want to have it at.
The 'story' takes you through the solar system and the background settings and effects are in great detail! It's a pretty game overall, I found myself staring at the background as I died a few times. haha..
The music is very nice in this game as well! Nice balance of bass and tunes~
(That's saying a lot as I tend to listen to my own music while games are muted)
The music is each stage is different and the rate that they play in depends on how you play the level.
Replay value, at least for me is very high.