Comments

• Mobile should not touch twice I thinkUse touchinput and uncheck the double touch hotspotand set hotspot label info to ""

  in Hotspot disappears on iPad? Comment by atfield January 2015
• prefab can be draged into object I thinkif not You can use code to deal with this.Set the player mesh to active to false by script.And to call the function,you can use object-> sendmessage->custom->function name

  in Make player invisible Comment by atfield January 2015