Now that's a pretty little thing :)
If you'd have some more time to expand on that, I'd love to hear some harmony/contrapuntal line every now and then, to spice things up a bit. Also, jump from intro to main part seems a bit too abrupt, something to glue both parts together would be nice - even a simple glissando would do the trick, but there are dozens of ways you can go about that.
As for technicalities, I'd say that chords seem to be a bit too loud compared to melody. Maybe it would also be good idea to put them a little bit lower - they steal too much spotlight just because they are right in the mids. Having melody so high on the other hand is preatty nice - gives off more whimsical, christmasy vibes :D