You got talent but it is not well used.
I can say that i'm fairly impressed with your flash skills for a 11 years old. You are pretty talented... You could become way better as time passes. That said, you don't use your talents well enough.
~GRAPHICS & ANIMATIONS~
The sprite animations had little flaws but they were pretty noticable.
For example, the lava in luigi's room kept disapearing and reapearing. But, then again, the animations were pretty good.
~STYLE~
You could have used better text managements. I mean, just putting plain color text next to a character is not very apealing. Also, maybe add a next button with the text.
~INTERACTIVITY~
I didn't understand the thing with the play button. The little animation was pretty funny but why do we need to press it 2 times? Not sure if that was necessary.
Sorry, but the scene select page sucked. Gradient background, plain grey square and... text. WAAAY too plain and uninteresting. Plus, it didn't even have a back button. Put more effort next time.
~SOUND~
Some of the Mario musics were a bit crappy but i won't complain. They were fair enough. The thing with your flash's music is that it changes too often. For a little unimportant scene there is a completely new music...
~STORY~
The big downside of this flash is the story. Okay, first, it started WAY too fast. I mean, what's with Mario?? He goes out of a castle (what the heck is this castle anyways?) seems to go for a walk, then get back and reenter from another door. Then we learn it's Luigi's room.
Okay, so the suspense was good up to this point. What happened? Then Mario searches for Luigi...to find... Frozen Bowser.
One word:WTF! He's frozen in the middle of a burning building (we didn't see the castle burning from outside though...) and he can talk and attack Mario, plus he's invincible... What WAS that all about?
Then he teleports mario(how?) to another location. This new place looks like mushroom kingdom but it says that he's not in the mushroom kingdom. And... what about luigi?
As you can see... There's alot of flaws in your story.
As for the title, i cannot even see the link between the story and the title.
~OVERALL~
Work harder on the scenario next time. Animations were good but there was some flaws. You got some talent, kid. Just learn to use it well.