The fast action of this game makes for a lot of fun gameplay. :)
It strikes me as stylistically like Meatboy meet's Binding of Issac with a bit of Retro City Rampage's Virtual-Boy-type graphics filter over it. Both characters are fun to play. The controls are pretty good, although the special button being Q can be somewhat cumbersome.
I also think it would be a good idea to add some kind of visual or audio cue to signal when the bar that allows you to use the special move fills up. I found myself having to glance at it to keep up but the fast pace of the game can make doing so more difficult.
A minor thing: clicking away from the screen did not automatically pause it. I'm not sure if that was an intentional decision or not but I thought I'd bring it up.
Overall, I think you guys did a great job. :)