Not a bad start...
The stick figure action was very smooth, and the music and sound seemed to go well with it all.
Some of the transitions could have been a little smoother, and maybe a background scene to give it some depth would be nice.
Also, maybe work some on the "special effects" (like the fireballs and the power ups) - it won't detract from the actual animation sequence.
Overall, I see a lot of potential here. Keep up the good effort.