Marvel, thanks for your quick response.
If indeed the scrolling is smooth, but I mean the beginning and the end is too abrupt.
I remember that A Whispered World also has the start and end abruptly. But in Kaptain Brawe it is different, begins and ends gently accelerating decelerating. Could be done with Lua?
Regarding the parallax scrolling of Visionaire, I know, just yesterday I was doing a test and it works great.