The graphics, animation, music and concept of this game are excellent, but gameplay is rather simplistic and the game is short.
I beat this game from the first try and I think it was too simple.
Basically everything is just for the show but the "R" attack, the mass conversion trough saxophone. You can go and beat up some random people at your leisure, fists are your best friends, kicks are ok, but the ranged attack is useless when the crowd gets bigger then a few people. But it's all just for the show, all you really need to do is set a big crowd on your rival with mass converting them with the R mass attack once the crowd is big enough. Your rival will convert the crowd with the R mass are attack as soon as her cooldown expires, you must convert the crowd immediately after that and set it on her to let the crowd beat her while she is on cooldown. If she converts just after your attack just lead the crowd around the map without using the mass conversion until the cooldown passes lead crowd to her, let her waste her mass conversion, then use your own. That's all, very easy to win this game in a couple of seconds, even if she has everyone blue on the field.
For all the cool music and great animation and big work that I suppose went into this game, it really offers just 5 minutes of fun once you realize this tactic and then there is no challenge anymore.