Yea too easy after you got a hang of controls, atleast if you have played ddr or frets on fire before. And those games what i've mentioned are way more fun imo.
Flash Flash Revolution is a better flash music game (check out the Resonance mix for lots more songs, and be sure to check out Spin It Up also - it's pretty good!). Not the same as playing DDR on a proper pad though.
Just tried Frets on Fire. Good game, but my computer and keyboard suck ass. My keyboard can't register two buttons at the same tum fast enough. For some reason, its only on this game.