Skeleton Keys for Tiny Tins's One Shot

Don’t know if this is the right place but when starting the game one skeleton key was allocated. I presume that SHIFT codes will be issued but when and where? As I am not on any Social Media platforms I normally use MentalMars or Reddit but these sites do not have any information that I can see. Does the Tiny Tina One Shot game therefore only have one Skeleton Key for NVHM, TVHM & UVHM?