That's right, after being approved and having my listing live on Microsoft Store, I sold my first copy of Calcul8², and it was through Microsoft, so kudos to them for doing something more than the others it would seem (taking my deliberate experiment in zero marketing into account).

insert victory dance

Well let me tell you, publishing to Windows Store is complex and was far from smooth. However I did it and now await their decision =D

Lot's of things that threw me with this one:
Huge install times (hours)
Problems importing the package.
Lengthy validation fail process and packaging.
Revision number kept firing back as incorrect. Revision numbers MUST have 0 on the end (i.e. 1.0.0.0) as the final 0 is reserved for MS use.

Plethora of new image (90+ so far) assets to create (there is supposed to be a generator tool, but it wasn't there so... manual)

Today has been spent creating the plethora of images required to submit your game to Facebook Instant Games.

All done, and Calcul8² has now been submitted for review! Fingers crossed I covered every base.

Point your device/s at https://www.adliberum.com/x/calcul82 to play!
OR on itchio at https://liamtwose.itch.io/calcul82