This could so be the either a cutscene song or a town song.
Whatever it could be, it is still the coolest song ever!
Very Fun and Interseting!
If Mario was in The Sims it'd sound like this
As a veteran of SMB3, I have to say that your song is quite different than the original in the fact that yours is peaceful and dare I say festive? Yes, this song could pass for a Christmas classic. Not sure why Christmas would be the choice, but it just has that feel to it.
When I saw the word "simple", I honestly expected it to not be any good. My apologies (with a 5 rating). Extremely upbeat and not as I expected. it's incredibly festive and just fits Mario-related theme!
Please contact me if you would like to use this in a project. We can discuss the details.