I really liked the graphics in the game, they're awesome! It's great that you guys have implemented multiplayer, but it also makes it hard to test out the game, because at the moment I hitted arena, I was the only one connected (so couldn't really play!)
I did notice the "Story" button, but once I clicked it, it didn't really do anything which is kind of odd. There also is an option button, but it doesn't even work! (Just hide it then :wink:)
Because I couldn't really judge the amount of fun in the game, I can't really say much about the gameplay, but the overall look seems very nice!