The community doesn't care if your computer is broke so you can't play "your favorite game". They only care about keeping things in certain places, when one thing is ported to another console, it'll get their panties bunched up. And in other words, this wouldn't work. The fact that SmartPhones are tiny, it would make buildings an inconvenience. It would take about 5+ seconds longer to place a brick than it would on the computer. Add that up, a 100 brick build would be about 8.5 minutes longer. Therefore, it would only produce small builds and not full-medium scale builds; of course, small builds aren't "suitable" for the Gallery, especially if a lot of people use the app and lots of small builds were added.