Doesn't appear to be much going on in this game - there aren't any collisions on the houses (or rocks, or water, or walls, or anything other than screen edges), there is only one NPC to talk to, the shop is stocked with nothing and the cave gives loot without anywhere to spend it. After getting to Polyphemus I killed him (at level 4) which felt appropriate for a boss battle, but after defeating him the monster was still there, so I beat him again. Since the character's name is "hero" and it's in some kind of Greek mythology inspired world I'm guessing we're Jason? Seems like an exercise in RPGmaker's built-in systems rather than a game that is meant to be played.