You are downloading the Slinky in Space AppX file v220.127.116.11 for Windows Phone. Slinky in Space is a free and fun Platformer game: Slinky in space is an endless runner where you either tap to the left or right of the slinky in order to jump to the next step. You can only go one ... You can now download the offline AppX file to install & try it.
Download Locations for Slinky in Space 18.104.22.168 AppX file
Note: To install it manually from an SD card, you should choose one of the server location above to get the offline Slinky in Space AppX file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.