A mod that simplifies the visuals of playing Getting Over It with Bennett Foddy to the absolute maximum:
This mod is not compatible with any kind of other cosmetic customizer for very obvious reason.
To install, download a release from the releases tab, then drop it into your BepInEx installation's plugins folder. If you don't have that, head to BepInEx documentation for installation instructions.
The mod takes 3 parameters, an accent color, foreground color, and background color. The mountain is set to the foreground, the player and water is set to the accent, and the background is a flat solid color.
The file for editing these values can be found in the BepInEx installation's config folder, it is named goi.ext.minimalism.cfg.