I really liked the artstyle of this game though there are a lot of missing things. The animations on the hammers was really clunky and not at all smooth, the player animations were not properly set up. You could try to update this and make it bigger by adding more levels GUI and stuff. I don't see the use of the theme here as well. Could have been better, but nice work

If you had implemented the game audio the feeling of your game would be awesome, and I think that is easy to implement this in Godot.
And you could try to think in some other game mechanic, to bring something different/unique to your game.