Thanks you both for the thumbs-up, I'm happy that someone likes the song...
I will consider ways to improve the "synth" situation...
I have also come to suspect that the guitar could be in better tune (I tuned it by listening to notes off a website, now I'm thinking why in the world didn't I just tune it by notes from the keyboard?), maybe it is time to get one of those electronic tuners with the lights.
I probably just separated the syllables too much in the word "Mandy" instead of making a more-pleasing sounding smooth transision between the syllables...The melody is sort of awkward (but also interesting and challenging) to sing and I'm not really a "singer" (I seem to sing the song a little bit different with each take).
Redoing the guitar, more practice, and redoing the vocals (probably redoing the whole song) could get some bugs out of the song but maybe this song is okay with a few bugs in it.