Wow, you suprised me with that transfer into the rock part, that was tight!!! Still, it was slightly repetitive, maybe if you changed it around more, not like the part with the circus melody, that was slightly aquward, but if you shortened it to make that the eventual ending, it would end up pretty nice with a volume decrease, like a fade out.
So basically, more diversity and kick, but for a start, not bad. Good job, keep up!
P.S. It seems the vocovoice was too soft, as I couldn't hear it too nicely, or was it meant to be like that?