Everyone should head on over to the actual game website to really enjoy it. The Kongregate version may as well be declared broken now, and the website has more songs, a community, forums, its own chat, and more! http://www.thorgaming.com/feelthebeats/epsilon/
Just click the chat tab once you have arrived and there will no doubt be someone willing to help you out.
To the people who have tried playing and it wouldn't work. The actually site for this game (which is better than the kong version, it has/had hundreds of songs) got its server hacked so now most every song on the site itself is deleted. A few of the songs on the real site are slowly being recovered by the original charters of the song but none of them are in this game. So if you want to at least play this game somewhat, go to thorgaming.com/feelthebeats. (I reccomend making an account so you can talk to users of the site about what happened)
I do not think they should bring back the karma relics. They are not fair at all when an old player has awesome ninjas and keeps destroying a new player who will never be able to catch up. I am fine with gold relics but karma should only be earned by levelling and achievment. (and daimyo)