I just downloaded and played Ys: Book I & II for VC

[GooseGaws]

Soriku said:

Can you explain the battle system? There's no attack button so how do you fight?

You fight by simply running into the enemies; if you attack them head-on, but are weaker, then you will likely suffer damage.  The idea is to attack them slightly from the side or from behind, keeping yourself safe but damaging the enemy in the process.  It sounds overly simple, but the movement is very quick (and even has a "fast" setting if you want to crank it up even higher), and if you get cornered by some strong foes you may find yourself dead very quickly.