I liked the gameplay!
The two main things I wish there were in this game are a music track and more "geometry" focus. I think you have a really good core gameplay loop here, but the not-so-simple-looking art drops a shade on the game overall. A music track would enhance the gameplay too!
I suggest you re-create this game with only simple geometric elements and focus on polishing it to improve your developing capabilities. You can use Figma for simple geometric shapes art-wise, and use Unity's post-processing and particle systems to polish the game on top of that. Overall, such a great game!
Great job!