Good story and good art, also I like the short animated scene.
But well.. all games also had the minus part so yeah this game also had.
First of all, for transport to another area with floor should be automatic, you should use "Player Touch" Instead of "Click Event" Since well.. I'm kind a confused because I should press the button first lol.
Second, The interact thing should be on the spot where's the object are, not on the floor, trust me it's still work since I'm also RPG Maker MV user.
And third, I know the reason why there is so many invisible wall, because is for the tall character can walk, but it's still work anyway without making more space for the character, just mapping the map like usual.
So well.. I will give you 4/5! I hope you can upgrade your RPG Maker skill for the next game you made!