This game is just STUPID amounts of addicting; after you get the hang of it (take about ten minutes or less), you just can't stop playing it. The controls are simple and mostly intuitive, and it isn't long before you're having a blast.
It's oddly relaxing, yet exciting; you're swinging over--and occasionally under--what I can only assume is some sort of ocean, looking like the unholy spawn of Spider-Man and a laser pointer, and at times it's difficult not to shout, "Wheeeee!" as you swing around hitting the targets that get you points.
There are no bad guys; the challenge is in your skills, your ability to hit all of the targets. There is no death, and you can change levels whenever you like. You never really feel like you're fighting with the game, just your own ability (or lack thereof), and that's part of the appeal, part of why it's actually a relaxing experience more than anything else.
Would I reccommend this game? You betcha. I like to play it while watching a video (with the music turned off) just to keep the ADD at bay. :)