It is fun , but it need some works.
There is no button to reset a flight, or it is not explained. I couldn't find any solution than quit to stop infinite flight.
I also couldn't use the flaps like in the video, and it took me time to realize that we controls it with the arrows, I never seen it written anywhere.
I totally agree about the scroll out, it is not easy to put any part in the place we want. It could also need a way to display all connection possibilities, or to click on the two green points to create a connection.