Ready to publish your application to Windows Store? Now, you have to export your project. Press F6 button in Construct2 window, a new window will pop up like this. You can choose in which store will your application publish for, a Windows Store or Windows Phone Store.
Click next, choose your directory to place your project and then Export.
Do not upload you application right after you got the project exported. Still need to do something with the package, so open the destination folder.
You still have to change some file which marked by red color, can be access with Visual Studio by clicking “.sln” file (marked by purple color). Just for image type file, you can directly change with your application image. Replace it with same name as mention in the file.
Add your information about the application in “about.html” file. See red mark bellow, change it with your apps description.
Same thing you have to do with “Privacy” and “Support”.
Use Visual Studio 2013 to create your application package (“.appxupload”). Don’t forget to test your application with the latest version of Windows Application Certification Kits (WACK). Now you can upload your “.appxupload” file to Windows Store. Make sure you have reserved you application name before create your application logo, etc.
Windows 8 Application Creation 