I just found this weirdly addictive but infuriatingly frustrating game called space ballz on some random swf site. I mean, you die every 3 seconds because the ledges are so thin, but when you die, you get really angry, but it makes you want to play more so you can see if you can ever do it.
It's kinda like Unreal Flash, once you have won 1 game, you're hooked.