This freakin' ROCKS!
The action is so fast paced and awesome! I also like how you added humor to it as Luigi was really funny in this. I hope he's around for the second one, when ever that comes out. I too am a little disappointed in how Mega Man did, but at least Zero had a badass performance, though a bit short. I can only hope Proto Man gets a shot in the next instalment. (and does better) The moves that Sonic was doing were awesome and Mario showed he was one tough guy.
You did an outstanding job with this and it shows. I really hope to see part 2 in the near future. Good music, animation and action make for a kickass flash. A+ dude.