I got... 1%.
I love the style, I love the concept, I still have no idea what a kerfzel is, but I just found the gameplay way too frustrating to be enjoyable. I never got a handle on the arm controls and I think the game kinda hinges on that. It took me two attempts and several minutes to get logged in, and I was never able to clear all of the popups when those came up. I tried mashing quickly, I tried being precise, but no matter what they kept spawning.
I made it to the second day but didn't bother continuing when it threw the same puzzles at me right out of the gate.