This level sucks.
No seriously, that's it. You can't do any cool shit while carrying Elise around and this stage is easily the least polished out of all of them. This is just here for the sake of completion. I tried taking different routes to at least mix things up a bit, but that didn't end so well, as you'll see at the end of the video.
In summary: Normal - go fast, Hard - go fast and collect rings, Very Hard - go fast again.
Normal: 0:00
Hard: 3:28
Very Hard: 7:13
...
https://www.youtube.com/watch?v=-XIvAxf8uGo