Well done @p3rla! Glad to hear you liked it!
As I said to @Noswis, please go ahead publishing your keygen and write up.
To all other 0x00sec members… just hurry up, I’ll stop granting Tier-0 Challenger Solver badges when a solution (keygen or write-up) is publicly posted!..
You still can get yours! 
and get one step closer to get your Tier-1 Challenger Solver Badge!!! I wonder who is going to be first to get one of those 