The Lunar Client will completely change how the main menu looks and even add some useful HUD interfaces like FPS, biome, coordinates, etc. You can open the client's custom settings by going into ...

Lunar Client currently supports Minecraft versions 1.7, 1.8, 1.12, 1.15, 1.16, ... If everything has been done correctly thus far, players will be greeted with this Lunar screen on launch.