In the disclosed systems and methods for competitive scene completion, in conjunction with a scene completion challenge, an image of an initial scene and a plurality of markers are displayed. For each user marker selection, virtual furnishing units corresponding to the unit type are displayed. User unit selection results in display of a three-dimensional graphic of the selected virtual furnishing unit at the corresponding coordinates within the scene, thereby creating an augmented scene that comprises the initial scene with three-dimensional graphics of selected virtual furnishing units. The augmented scene is submitted to a remote server. The user is provided with a reward that consists of credits. Responsive to user selection to access the store, a user interface for the store is displayed within the application. Visual representations of tangible products are displayed. The credits are configured for use towards purchase of the tangible products.