I got a(n) S in hard! My score was over 9000 with a max combo of 999. I scored 999 perfects, 0 greats, and 0 goods. I got only 0 bads and 0 misses! I was playing on 15 speed and had 8 crazy options on. Great game, I like it! Play it here: http://www.thorgaming.com/games/3296/feel-the-beat.html
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WAIT FOR THE CIRCLE TO FINISH. yOUR COMPUTER EXPLODES.
Typing this from another computer, my first one didn't live to tell the tale because it divided by 0.
ROFL, great game. By the way, those who don't know, around the third or fourth room, you're supposed to die. The game is called You Only Live Once for a reason.
For level 16, try encasing the circle in your bridge to make it safely roll to the other platform ((Draw a giant rectangle that has the circle inside it and reaches the other platform safely)), then use trial and error to make a catapult to bring the circle back.
Pretty easy, just keep the wood mills out of the fruit trees and you will not see more than 5 deer in the game. Hire loads of monsters when you get the chance to tame them; they work the hardest.