I would lie if I said that this is not addictive game. It really is. Despite really minimalistic graphics, basic 'good' and 'bad' power-ups and predictive obstacles, during the play and after the failure I always felt like I could play just one more round, which is a element of addiction by definition. To be honest, it's not kind of a game that would keep you awake whole night, nowhere near that. And 'playing' one more round has neever been so easy. All you need is to press space bar and you're back in the game.

As already mentioned, there are good and bad power ups. Good ones can make your playing somewhat easier by lowering the center spot, slowing down the time, reduce gravity, introducing more platforms ('double boards') and so on. Bad black cloud is a power up in a negative sense, if you touch it you die, simple as that.