My jam games launcher is coming along slowly. I added a slowly moving background to make it livelier. It looks exactly as I wanted, I'm almost surprised it looks so good. I took a shader from an underwater game of mine currently on hiatus (that displays a directional light and caustic textures), I added specular to it to get the "low-poly glow" feeling I wanted (thanks learnopengl), and I generate a floor mesh procedurally.