Hi SD, I noticed there are few games that do not save your scores, because the token is empty in their requests to submit score. This games are:
http://melting-mindz.com/game_page.php?Type=UNITY&Size=1200x660&Game=Down-On-The-Ranch-Escape#google_vignette
http://melting-mindz.com/game_page.php?Type=FLASH&Size=800x600&Game=The-Clue-Crew-High-School-Mystery
http://melting-mindz.com/game_page.php?Type=FLASH&Size=1200x660&Game=Asylum-2019
You can see their High Scores are almost empty because of it.
I have had the empty request while testing. I can't quite pin point it. When I played again it worked fine. It could be that I have to make sure there are checks to prevent cheating. I will look into it, thank you for creating a list!
Now everything works, thanks!