Dude, are those shots for real? At first I figured this was another high school kid who took a Summer graphic design class and figured he could 'OMG texture hax' Brawl.
Now seeing that you want to do a sprite game - well that's not impossible at all. Mugen games can be created by chimps. Most are sadly, hence mugen's somewhat poor reputation in the hardcore community, but hey, for every hundred failures there's a KoF Zillion.
Anyway... now it's not so much doubting that you'll follow through on this "project" - it's just that your game looks really awful. Seriously, find a spriter or something. Resized GBA game graphics look horrible. BGs shouldn't be static images. You need a GUI. And that title screen is an MS Paint nightmare.
Given the level of your work there, I'm gonna go ahead and say that you're around 10. That's an estimate, not an insult - you're about where I was at 9 or so. Kiddo, wait until you're older. Making video games is a hobby for bigger kids and grown-ups, and even then, it's not an easy thing, ok?
Guys - don't feed his dreams, because if he works his butt of on this pile and then releases it, he's gonna get ridiculed. That's not cool.