Potential!
Hey, it's off to a really good start for something you only put 3 hours into. You should definitely make a good set of flashes out of this, expanding on each character's story. Develop the plot prior to what we got to see here, to explain the situation. (So far it's Random rebels pwning the MNT's and pinning Mario down for an unknown reason) and then wow us with an awesome climax and flash skillz. You can certainly do both if you put the time into it, from what I've seen here.