Great game! Usually these kind of games are either way too hard without any kind of walkthrough or they are so easy they can be completed within minutes. This one does very well on managing difficulty!
I got a(n) A- on medium! My score was 2111731 with a max combo of 127. I scored 240 perfects, 95 greats, and 10 goods. I got only 2 bads and 8 misses! I was playing on 5 speed and had 0 crazy options on. Great game, I like it! Play it here: http://www.thorgaming.com/games/3926/feel-the-beat.html
 "Mu Complex : Episode One"){kind=icon}
 "Galgje"){kind=icon}
 "Feel the Beat (F2Jam)"){kind=icon}
 "Music Catch"){kind=icon}