Okay, I got it running. I can send you the Mac x64 port if you want it. Impressive animations, great use of color, but I do have a few criticisms. If you intend to update, I'd love to see some of these in a sequel/spinoff.
First, the menu screen could use some animation. The buttons feel kind of flat.
Also, instead of two punch animations, Maybe make the heavy attack a kick? It would make the player feel more athletic and better differenciate the attacks
Combos are fun, but not needed to make a good fighting game. Charge attacks add a lot of depth, and power-ups make strategy far more interesting.
I've never made a complex fighting game before, but as a fellow dev I can appreciate the effort that went the rigging, animation and post-processing. Overall, great job! I'd totally use this as a screensaver if I could.