CLICK the icons next to the track number. This adds the track to a play list. When you have a selection click the sprite in top right corner. (single song mode). This should bring up a playlist sprite a playlist should appear on the left of the screen. just after this hit the play button at the bottom of the screen. You can play tracks individually by clicking the name of the track and then clicking the play button. I might try adding more tracks to see how things are coped with and most probably re introduce the visualizations and player skins that were in the original project.
I was adapting the original project by "webdesigner97" so as to be able to accomodate a significantly larger playlist..