There is no story, and no real sophistication in the gameplay - nor is either necessary. You move a "ship" around the screen, trying to avoid obstacles (usually blocks or pits, a few moving parts).
Around you is a neon lighted strobing light tunnel and the course itself is only a few meters visible, building itself as you race along.
What makes the game so interesting is the way the music meshes with the gameplay, the way you can, or rather must, lose yourself until there is nothing but the moving ship and the gradually appearing course.
You don't have to think
about what you do, you just have to DO
it. If you start to plan ahead, you'll likely to crash into a block.
Minimal as the gameplay is, it has a soothing effect - you have
to be calm to get good reactions, after all.
The controls react instantly, and there is no need to familiarize yourself with the way the game is handled. You might need a few tries to get a feeling for how the "ship" reacts, but it doesn't seem to have any personality at all - you push the left key, it goes left. No delay, no sliding. Ideally it'll be as if it reacts to your thoughts.
My only regret is that the music restarts when you die in endless mode. Since I die often, it means I don't get to hear the rest of it.
I'm not entirely sure how much I think this game is worth. I bought it for 1.25 Euro, and I certainly don't regret spending that money.
Would I have paid more? Might be. I don't know how much I'll end up playing it, but even if I didn't play it any more, I'd consider it money well spent.
Unfortunately there is no demo version available for the PC, which IMO would be a good idea, since you can only experience the game by playing it - viewing a video dosn't tell you halfway enough.