Hi, Elliot.
Love the song, and everything about it... except what the pitch correction is doing to the vocals. It has a sort of "hollow" electronic sound.
Now, I'm a big fan of doing whatever I can to my vocals to make them better than they actually are, and I've used Melodyne and several other pitch correction tools to boot. So I'm not against using pitch correction at all, if needed.
I'm guessing that you duplicated the melody line in Melodyne and turned it into a harmony, because the two vocal lines are tracking so closely. That (and not just Melodyne) are probably what's causing that sound.
As a rule, you should try singing the line again, and use that take to create the harmony. It's OK if the rhythm is slightly different, too - that'll give it some independence. And even though you're applying pitch correction, don't make it 100% - dial it back a bit, because you
want them to keep some differences.
I suspect you already know all this, but... well, just in case.

Anyway, I really liked the song. Easy on the ears, nicely sung, good arrangement. Simple and to the point.