I've played a few exploration games so I know about that genre, but in this case, there was litteraly nothing happening after tenths of minutes of me walking around : no change in music, no change of scenery, no door oppening, no narration voice or written or illustrated throught the landscape ; truly nothing.
So I geniunely believe that the game wasn't working on my device. I mean nothing more by it.
Yet. It was a bit frustrating because of the long loading times and sideloading work.
I wouldn't complain about a free game of course.