Seems flawed to me as well on the Windows 10 app, new candies keep coming from the top in the top corners and from the bottom in the bottom corners filling the space where the biscuit should go.
Hello, Here's an example at around 0:03, I tried to move the red candy left twice and it moved down instead: https://youtu.be/yL1526SgiDE I'm running the Windows 10 app, on Windows 10 1903, playing with mouse and a 27" display in 3840x2160 resolution.