Wow! The archetypal 'game of two halves', with quite a few easier ones in the top half but lots of much more difficult ones in the bottom.
There is a theme, as Geeker and Rog have already said, but it's not an all encompassing one so, as such, didn't really help or hinder.
COD - 23d with 10a and 2d as runner-ups.
Thanks to Kite for an enjoyable and challenging Prize.
Stay safe:-)