I had a hard time figuring out your controls. It took me awhile to figure out that the character moves automatically, and I couldn't use WASD. You may want to consider posting some instructions on your Itch.io page.
Including head bobbing is a good detail, but it is too exaggerated in your game. It's exaggerated to the point that it hampers immersion rather than increase it, and it also disorients the player.
I liked the environments you've done. They're simple but very beautiful.