As of 1 March 2020 it appears a licensing issue has finally stopped easy access to the Project Spark game, and although some people are finding ways round it by ensuring that they are offline before accessing the game and tapping the A button really – this is not really sustainable and most people are not going to bother with this.
It was obvious that something like this could happen, as licenses are not being renewed for the game, and no updates are being made to safeguard it from Xbox system changes.
I hope everyone enjoyed their time with this great game. I will leave this website up for nostalgic and historical interest purposes.
If you are interested in making games for consoles, then I can highly recommend Dreams for the PS4. Very similar to Spark but with the added bonus of 3D modelling, stop frame animation and music creation.