Good game. The characters are, indeed, cute and the music matches the gameplay well.
I only wish there was an alternative control scheme for character 3, IJKL perhaps.
Also, the game feels very punishing when one hit kills you outright. Maybe a character that gets hit could still be revived by the others?
(Or, if you wanted to go crazy and take the idea to its logical conclusion, why stop at 3 guys. Why not just keep adding them until you have to use every last key on the keyboard to control them all? :D)