There is a glitch on the momentum level, where the marble gets stuck behind a wall after dropping into a hole.

Can someone explain this, the italicized part below, in more detail?

>> When you approach from the side street, as a driver, the order of dealing with other traffic is different, but the priority is similar. First you will notice a speed bump. The complete intersection is on a raised table. Pedestrians would not have priority if the street was level, but now that it isn’t the “exit construction” rule could apply and in that case a crossing pedestrian would have priority. But for that rule to apply the footway should be continuous, and that is not the case here.

Is there priority for the pedestrian if they are already crossing the side street when a car driving down the side street approaches the intersection, or can the pedestrian be run over by the car without consequence to the driver?

Here is a related article from a UK perspective:

https://www.cycling-embassy.org.uk/blog/2013/07/03/how-does-...

And yet the photo in the article shows piano teeth markings before the shark teeth, which indicates a level change for the car. In that case I would assume that cars are required to yield to pedestrians crossing the side street even though the sidewalk surface is not continuous.