Very strong submission!
I like the art, the music, the sfx... all comes together nicely with the gameplay.
Kudos even managing to implement two difficultys, and having played both, they seem really balance to their respective tag.
The only feedback I could think of, in hard mode I first thought "Oh I probably need to restart, Im too slow throwing things to the ground" to "Oh ... load up that big pile on the ground and now just spam"... Even though that way I could "win" the hard mode, I felt it was a bit cheaty. But that being said.. I wouldn't know a solution to it ^^.
Nevertheless I really enjoyed the game and loved it.