I normally don't purchase apps, but thought I would give this one a try based solely on the fact that this is a Portal themed game. I wish I hadn't purchased it. I realize now that pinball is not my thing, but beyond that there is little in this game that keeps me engaged. I played it twice and don't have the desire to play again. The menu user interface is not very mobile friendly. Feels like it was built for a PC. I only give it two stars because of the portal theme.
Portal ® Pinball at Google Play market analyse