Maybe there is a better way to do this, but...
When I create multiple instances of the same object and then export it to HTML 5 it creates a separate sprite sheet graphic in the export even though all of those objects use the same sheet/images.
Of course I can create some objects dynamically and avoid this, but it seems to me that they should share the same sprite sheet resource automatically.
NOTE: I created the sprite sheet by loading multiple images into the objects sprite. Maybe that has something to do with it?