This is pretty good for your second game! I was using Godot too when I first started publishing games on itch. One of my Godot games also failed to show visual effects in the browser version. I wonder what causes that. But I didn't get a very satisfying kill animation for the pumpkins on either version. The explosion looks quite nice so it's jarring to see them just disappear when killing them with the sword instead. I suggest adding at least a particle. I also recommend using sprites with a more consistent art style and resolution on your future projects.
I thought that the mechanic of sleeping to regain health and energy to swing your sword was creative and ties into the nightmare theme of the jam quite well.