This is a really simple modification to the default Spicetify theme that adds the gruvbox colour palette. It also forces the player bar to be visible when the window has a small vertical height.
After cloning this repo copy it to the spicetify theme folder.
mv ./spicetify-default-gruvbox ~/.config/spicetify/Themes
Enable the theme: spicetify config current_theme spicetify-default-gruvbox
Enable the colour scheme: spicetify config color_scheme gruvbox