Only works with Touch for no good reason. Having paid for this this experience, I find that apparently it only works with Touch. This is annoying for two reasons. First, because there's no indication in the App Store entry that Touch is required: the Supported controllers field is empty. Second, because there doesn't seem to be any reason why this experience should require Touch. It seems to be a completely straightforward building-explorer app, with no manipulation of objects in the environment or the like. Such an experience should work perfectly well with an XBox controller, or the Oculus Remote, or even just a computer keyboard. So hopefully this will be fixed soon.
Limited, but not bad. It's a recreation of ancient history, but doesn't feel very real. It's good for getting a sense of scale, the colorings and materials, and for the educational snippets.
Not good for export. The model has gaps due to floating point error on the position of the cubes. It would be better practice to check for faces and vertices within a very small radius and remove redundant faces/vertices. This would fix the issue and optimize the model.
You would likely need to add some code for texturing, assigning 1 pixel on a material to each individual color and applying that to the model and modifying the UVs to suit.