Thanks for your comment :)
First about the maze behind the tree: You can access to the end of it if you have 3 flames if I remember correctly (before the acess is gone)
Second: the "bad ending" is available if you didn't washed all the dungeon (so it can be missable if you already washed it before the end)
And I'm very happy it made you want to create something too!! Don't forget to tell me if you decide to release something one day :3