You play as Free de la hoya and your main goal is to burst the other opponent which you can choose from by clicking on them in the title screen. Mirage claw also has a long cooldown. if you get stuck in the walls either attack or got to the middle and that should fix it.
Valkyrie is super fast and can burst you. Satomb can dodge and if you don't attack he can deflect using roller defence Ragnarök starts using his Ragnarök typhoon making him hard to hit. If you see a burst cutscene at the beginning just press the flag and it will restart