This game is pretty interesting and seems like some of those other games on the internet where you try to stay aloft.
The tunnel you travel through gets smaller and smaller, forcing you to eventually die. The game is fun at first, but knowing you'll always at a certain point kind of ruins it.
The controls are okay, press up to go up. I thought it accelerated downwards a bit too fast and not upwards as fast. The acceleration where it stands in the same spot for a second and then starts moving downwards means that its hard to control, especially when the tunnel is really small and zigzags.
The game is awesome in your free time and challenging people, but I wouldn't count on playing it that long and still being interested.