You are downloading the Mush Run AppX file v18.104.22.168 for Windows Phone. Mush Run is a free and fun Action & Adventure game: Do you like adventures ? Help Mush with his run to ... You can now download the offline AppX file to install & try it.
Download Locations for Mush Run 22.214.171.124 AppX file
Note: To install it manually from an SD card, you should choose one of the server location above to get the offline Mush Run AppX file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.