It determines how close the image could get to the center of the page.
Affects only for BG images.
Should be between 0 and 1.
0 means it wont be visible,
0.5 means it could reach from 0 to 0.25width on the left side and from 0.75 to 1width on the right side of the path,
1 means, image could reach the center of the page.
Default is 0.6
It determines how often this image could repeat in the same level.
Affects only for BG images.
1 means it appear once per level.
2 means it appear twice per level.
0.5 means it appear once every two levels.
TIP: Try to assign a value which is a factor of LevelMapParams.levelCount. It helps to equally distribute the images.