Okay, so I'm not going to talk about scripts because that's not what the video was depicting, but rather, I'm going to talk about the overworld itself as that was what the video was showcasing.
In general, the overworld looks decent and I like the maze that you have going. The biggest problem with the overworld for me is that you have to cut WAY too many bushes with your sword to get through. At least for me, it would be incredibly tedious to have to cut all those bushes throughout exploring the overworlds. It also makes the screens look far more cluttered than they actually are. I suggest that you tone down the number of bushes by a large extent so that people can better traverse the overworld and not be agonized because they have to cut so many bushes.
Another point I want to make out is that the houses in which you get some of the items are way too plain. You need to add details in those houses to make them seem more alive and also make the quest in general show a bit more effort.
Those are my suggestions; do with them what you wish. Good luck with the quest! 