Awesome game. Very striking visuals and colors while only using simple shapes is really cool, your post processing use was great. The enemy variety was nice but I didn't appreciate some of them having wildly different mechanics like much faster speed than I could use.
There were situations where they would swing wildly from either side of the screen bouncing the ball to the opposite corners and it was very difficult not to lose a ton of lives. Seeing as the main strategy to win was to keep jump bouncing the ball faster than your opponent could hope to deal with, when the AI started doing this while also being both bigger and faster wasn't the most fun.
All in all tho, a quite stunning gamejam entry and you did great!