I am working on UI designs for a mobile app which has a lot of games in it. This app is restricted for now to landscape mode. One important screen in this app is the game download screen where there is information about the game with a button on the top to buy/download the game, images/ screenshots of the game on the top again and panel for description and related copy in the bottom. One of the options we are exploring is to have the Buy/ Download button overlap the game images that can be scrolled horizontally. Any thoughts on how this could possibly impact the experience of the user? Can two interactive elements overlap in mobile UI where the one element is much smaller than other like a button over an interactive image (image can be tapped on open full screen)?
https://dl.dropboxusercontent.com/u/1592087/wireframe/Stackxchange%20copy.png