Boss world hub design

I decided to do another landscape like the dream world hub, at first I was going to do the level for the phobia for heights but I didn't like the design I did very much because I felt that it didn't represent the fear enough so I decided to change it into the level right before you fight the boss.

This was the first design I came up with

This was my main influence for the boss world, Its concept are from a game called Epic Mickey