Wow, im really blown away, I didn't think anyone could make use of the theme as well as you did, I love this game, and yes I got tricked on that one level. The level transitions were SO smoooooth.
Just found one problem with the audio, the top slider seemed to not do anything (im guessing it's for the ball hit sound), and the bottom slider is exponential, i.e. first 80% do nothing and last 20% control everything, if u make ur slider go from 0.0001 to 1, then in code use Mathf.Log10(slider.value)*20f; it should convert from exponential to linear (that's if you're using audio mixers, don't use that on normal audio sources, they are already linear). Hope this helps! :)