Why does this song sound sad?

At first I was confused by reading that, then I realized it was treble clef... and I have difficulty reading anything other than alto clef.

So... G# E G# E A G# for the first two measures.

I'm guessing it's F# minor since something that sounds like that wouldn't be in A major scale. Dunno how to explain it, so yeah. Maybe Rick can tell you more.