Your game is pretty cool!
I like the spin on the classic, it allows both you and the player to get creative with the way the game is played. You have some very innovative ideas that work pretty well, fans would be proud. The upgrades are solid and come around often enough to keep the player engaged. I especially enjoy the widening one, it's satisfying to juggle a bunch of balls at once without too much headache.
I don't really have any criticisms, didn't find any bugs or glitches on my end. I like the ideas you stated above, it's turning out to be a pretty fun pick-up-and-play!
Here's my game if you wouldn't mind checking it out: https://wasabiiii.itch.io/grass-elemental-demo-demo
Overall a pretty nice game!