You will need the PowerPoint application or a PowerPoint viewer to play the game. You can perform these exercises on your mobile devices with access to Office 365 Mobile or a seperate App for your Apple or Android device.
The Jeopardy Game should open in the Slide Show view and be immediatly playable. If it opens in the regular PowerPoint presentation view, go to the SLIDE SHOW tab on the ribbon and start the show from THE BEGINNING (command on the far left). You can play the game as many times as you like and in any order you like.