Hey, will rebuild the project and upload more recent .apk file this evening, I see there's definitely some problem with it judging by the dude in the comment below having a problem too (although I wish he told me as much as you).
In the meantime, as a workaround you can download Android Studio and build from sources (link to my Github in the description).
Viewing post in Spelunky themed Android live wallpaper comments
I actually rebuild the project right now and uploaded it, also tested on my phone and it works as intended.
I unzipped the previous .apk and compared with the new one - previously I must have accidentally uploaded dummy .apk with the blank libGDX project (this is the reason for the smiley face and "bad logic"), for which I am terribly sorry.
Please let me know if it works.