Funny.
Yeah, it was okay. The animation and art weren't particularly good, but the music slotted into place nicely.
The thing that didn't work was the length - consider how many times Mario is just standing still. If you played this at twice it's speed, it'd be funnier - consider "Dad at work", where you're still laughing at the last piece of violence while the next one is being committed. Here, it seems like you're waiting for a while between each smile. And some better, more random acts of violence would have made it funnier.
Did like the bit with the Princesses though, and the whole pupil-widening thing. This deserved to pass judgement, but for a better score next time consider making it shorter with a faster pace.