99 Dead Balloons - - - To get it, put heaps and heaps of blade shooters all around the track. Also put one Super Monkey at the second corner and set it to "First". - - - EASY WIN.
I just put out towers in strategic locations in this order.
2 Dart Monkeys
2 Tack Shooters
2 Boomerang Monkeys
2 Spike-O-Pults
2 Cannons
1 Monkey Beacon
1 Super Monkey.
I always upgrade them to full before passing on to the next tower.
I got a(n) B on easy! My score was 507717 with a max combo of 40. I scored 101 perfects, 120 greats, and 24 goods. I got only 4 bads and 30 misses! I was playing on 3.4 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
 "Music Catch"){kind=icon}
 "Free Rider 2"){kind=icon}
 "Bloons Tower Defense"){kind=icon}
 "Bloons Tower Defense 3"){kind=icon}
 "Circle Vs. Square!"){kind=icon}
 "God's Playing Field"){kind=icon}
 "Platform Racing 2"){kind=icon}
 "Rocket Car 2"){kind=icon}
 "New User Tutorial"){kind=icon}
 "Fancy Pants Adventure: World 2"){kind=icon}
 "Interactive Buddy"){kind=icon}
 "a kongrete chat room thing"){kind=icon}
 "Feel the Beat (F2Jam)"){kind=icon}