Simple and quite captivating! This would work so well with a phone(if you haven't implemented that already). I also love how every iteration of the levels feels unique owing to how many parts there are. The music also did not seem to loop at all which was nice!
I enjoyed it a lot but also felt that the ball could use more weight. Not only do I think that this would stop the ball from shooting to the sides at a nudge but also compliment the shapes extremely well. I can already see myself having fun carefully balancing my way through the sawtooth pattern before getting fried at the top.
Another change that I think would really help the game is making the colors of the grids more defined. I would often try to move those platforms on the lower end of their zones to accidentally move the ones below them too often. At first it was because I thought I had to click on the shapes but though figuring out that it was the grids made it easier, it was still sometimes difficult to differentiate them quickly.
Otherwise, solid submission!