Construct has no concept of one object obscuring another. You need to handle that yourself. You'd need to explain more on what you are ultimately trying to do. You can use a single sprite with different frames or animations, then the 'top' condition works. Otherwise you can use families, and the 'top' condition, and use an instance variable with your points, assigned by object, rather than hardcoding the values. I'd need more info to provide the appropriate demo.