I loved the piano in the beginning! It really gave the piece a unique feel.
Though i think you should give the piano a more simplistic feel. Its too energetic like a fast happy hardcore lead melody.
As you mentioned the slicing was very original and really fun to listen to.
The melody was very good and i loved the sub melody along with it, they really went well together and gave the song a fuller feeling.
The break was definitely my favorite part. It was so well done.
Vocals were very nice, the delay and reverb were perfect.
Really good man, if the contest works out ull definitely do well.