I Wish You Were My Friend
This is not an entirely original game. Many sounds are borrowed from Worms 2, and several concepts from Super Smash Brothers. However, I compare what you have done here to what the Japanese do to American Inventions: you have taken a pre-existing concept and made it more accessible and possibly better. I mean screw Steinway pianos when Yamaha makes similar ones for a lower price. Your game is comparably fun to the top multiplayer real-time battle games, and available to people all over the world through the internet.
The graphics are crisp and clear because characters actually stand on their platforms without penetrating them with their feet, and have a visible outline, separating them from their background. The thought of having every character be a system of circles was brought into reality very nicely. I enjoyed mixing the characters to give them new looks and names. By the way, it would appear you forgot to capitalize a few of them.
The "x" attack of the magic weapon is too powerful. Though I realise that because both characters have equal access to it there is a balance of power, this weapon induces total chaos, like the atom bomb, and that makes one too many. Now that I'm complaining, it would be nice to have vertical platforms in the level editor, so as to create something similar to the eskimo level. Perhaps you might consider making these levels programmable (i.e. moving clouds)? I hope you consider these few tips from a fan for your XML multiplayer sequel.
I enjoyed all the songs and I'm glad you have chosen ParagonX9 because his music gets me pumped. I can't tell which song you made, but because they're all great songs: congratulations on a good one. Speaking of soundwaves, the sounds are very well fitted to the gameplay and I think the falling off the edge noise is very funny.