Cool game!
For me the game isn't really hard or easy, because there isn't a given goal to reach except for a self-defined high score. Maybe if you made different perks for reaching certain scores or different game modes and achievements, would the difficulty be a little better to discern.
The physical model is kind of basic but fleshed out, like the rest of the game. The aesthetic reminds me of Poptropica, if you know that game.
I think I was able to beat some of the bosses rather easily, but I may not have gotten to some of them. I got a little bored of the gameplay about 5 minutes in... Maybe you can make a really fun "hook" that can grab the player's attention right from the start?
The UI is nice, it would work very well in a mobile game. The voice lines in the game are kind of funny sometimes, but other times they sound a little robotic. Fortunately, I had no bugs or any other issues.
Feel free to check out my game and leave feedback: https://wasabiiii.itch.io/grass-elemental-demo-demo
This has some potential, I hope you reach your ambitious yet relatable goal!