For every level create a global variable, level1score,level2score, etc.
Create a globalvariable totalscore and set it to level1score+level2score+.. etc.
Do you mean local variable for the individual scores??
Also, the music files are something temporary I put in to test out. Haha. And since they are .wav files, they are kinda big. I made the visuals high-definition to get more marks in my grade :P
Unless I should reduce the resolutions to save file size??