Hi, welcome to Nightcore Universe. I have just tried out your page, it is interesting to see you are not using YouTube videos but jpgs and mp3, I suppose that require more work then embedding YouTube videos. Which is good for viewer because of the faster load time.
However, the audio quality is not good, distortion can be heard. Other than the audio quality, another thing to improve is to display artist names, song name (and remix name), maybe the YouTube channel you hear/got it from too.