Yeah I remember your last game from the GWJ! Your games are definitely great candidates for some leaderboards :)
The instructions are pretty good and it's actually pretty quick to implement without too much hassle.
I'll just share this just in case you have the same hurdle I did implementing it in Godot.
I had some trouble following the instructions cus they were not super clear on one part: "Enable Guest Login"
Here's a screenshot where to find it.
Took me a while of digging in message boards to find someone talking about this and provide the answer! -->
