Well...
As you said, some parts work better than others.
What I thought you did really well on was the visuals. The backgrounds looked good, and you had put time into coloring and shading everything.
You need to work on your comedic timing though, not all of the bits were funny, and the randomness wasn't timed very well.
So try and work on that in your future submissions.
PS. Nipple twist was fun though!