Thank you for playing, high score and for reporting a bug.
I'm sorry for freeze related issues, I used old API version (that didn't give medals but displayed the NG medal-notification window) and new API version (that didn't display NG medal-notification window but did give out medals) both in the game and they worked just fine simultaneously until now. It seems that NG changed something on their part and now I can use only one API version without problems.
Medals will appear on your 'Recent Game Medals' list once you won them but you won't see in-game notifications. I will have to insert medal-msgs manually in a next few days.