My characters are hidden behind the "sidewalk"

Hi, does anybody know if there is a way to “bring forward” one object or “bring back” an object?

This is my game: http://www.flowlab.io/game/play/1031970

My enemy characters are hidden behind my sidewalk object.

Go to the object, click “edit”. In the bottom right you can click on “properties”. Here you can change the display order of your object, set it to 2 or more and your object will be in front of the other objects.