All of the themes are purely cosmetic, and they don’t alter much regarding user experience.
If you don’t like the default appearance of this player, you can change the way it looks by applying a new skin. Once you get used to it, it becomes easier to navigate. It is hard to find tools like graphic and sound equalizer, which is frustrating for new users. If you want to change the sound or any other settings, you’ll have to navigate to the player’s menu. There are very few on-screen buttons aside from the necessary playback control. While it is minimalist in design, it isn’t very intuitive.