Thanks! Yes there were actually four tracks, the intro, two 8-bit- tracks for the levels that alternate and level 1:5 has a rendition where Skele-Tom hums his own theme song to himself as you play.
As for the two issues you mentioned, I am aware of them both and I talk about them in my Post Mortem Devlog. The Start/Resume actually does change names normally from New and Resume, however in the last 30 minutes of the jam I added the 6 level buttons with the pumpkin indicators. The New/Resume button triggers the name change off itself being clicked, and I didn't have time to fiddle with the code, so I just hard-coded it to Resume, knowing that if you clicked it instead of the 1 : 1 button it would start the correct level. I literally ran out of time and got the changes uploaded one minute before the jam closed.
As for for the second, it had to do with the menu being a 2D object inside a shader, inside a viewport set in a 3D object. I was going to have to implement ray-casting for the menu to work through those layers and it was lower priority. The positions that were working are the actual positions of the buttons without the overlay.