Not quite there.
There was a lot that this movie did well, but it didn't offer much that hasn't been seen already.
The sound effects worked very well and added a bit to the movie, but I think music would have infinitely improved the production. Perhaps the dungeon music from Mario?
Additionally, the animation was smooth, but sprites are a little easier to use than drawing frame by frame. I did notice a tween or two, and those worked well. I have nothing bad to say about the technical aspects of your animation.
The ending was unexpected and pretty funny, so points for that as well.
However, the movie could have been improved if it were just a little bit longer. It was over before I was really engaged, but I did enjoy what I saw.