Pretty cool! Some quick feedback: I don't see any reason not to throw the ball at full force, so it's a bit annoying to have to "charge" it manually. And it's a bit hard to know what to do when playing besides "just hit something and try to bounce it to something else". Despite this I reached frame 16 quite easily which I feel was a bit too easy.
The upgrades are cool but I wish I could see some more "interesting" upgrades that change my strategy. The best "combo" I had (which was cool) was "color balls are 4, 5 and 6" with "only odd color balls at start". and some buffs to odd balls. But that's it.
Had some fun but missing some content/variety/strategy to get me hooked.
Cheers :)