Almost perfect!
I adore the game. You have approached a classic title perfectly considering the theme and the geometric constraints. I see lots of potential in this game!
The main thing I think you should focus on if you decide to develop the game further is juice elements. You have a solid core gameplay loop that is so fun, and you should crown it with juice to make this an amazing title!
The visuals are also great both considering the color palette and the post-processing effects you have implemented. The game has a great "geometry" feeling to it too. Hands down, one of the best games I have played considering the submissions of this jam.
Well done!