I'm always all for the release of source code.
Edit:
This is just my first impression after having been killed several times in a row.
Rover Mansion is way too hard.
The random nature of the enemies and them having varying ways to deal with them is too overwhelming.
Given the very limited speed Simon has at the point it's too much of a difficulty leap from the first gate to the second.
Is there supposed to be a whip upgrade before this?
I leave a more detailed impression later.