I did not want to suggest it again, since the GWD team decided not to allow this feature in new versions any more. There is a workaround for overlapping images that worked last with version 1.6.2. and the watch faces you could see in store might be made with it.
If you are willing to sacrifice some new features, go trough possible trouble installing older version and risk that Samsung may decide to stop supporting watch faces created with older GWD version, then check this thread: How to make changeable watch hands with fixed tapping area?