If you are using GMS2, take a look at the layer system. It lets you specifically put objects to show on top of other objects. If on GMS1 still, you can change the depth variable to get the same affect.
If you are using GMS2, take a look at the layer system. It lets you specifically put objects to show on top of other objects. If on GMS1 still, you can change the depth variable to get the same affect.