Nice little game, I can see the Bloons TD influence here, but where you are the one manually popping balloons! I loved the music too (don't know if you made it ir if it's an asset), and the colorful esthetic.
There is a bug, however, where you can keep popping balloons even after the game ends, by clicking on balloons at the side of the screen, and therefore farm money without ever losing lives from the "game over screen".
Other than this little bug fix, I'd also suggest that you make balloons movr slower at the start of the game, and gradually get faster later on in the game so that runs become harder snd harder not only because balloons get more and more layers, and this would makr the game stay challenging even after you max out your level from the main menu.
I'd also popping animations to balloons and maybe a better indicator to show you when you lose one life (for example a mild white screen flash).
The game was very fun, it's also playable on mobile and there I'd say it's even more enjoyable! Good job overall!