@Valerieal
Appstore IOS requirement bypass is straightforward.
Install a tweak named "LowerInstall" by Julioverne. it spoofs the iosversion. Set it on the latest iOS and you can install anything from the appstore, even bank apps.
I'm currently on a Jailbroken 12 Pro Max running 14.1 playing this game with no issues.
I’ve been exploiting this game for couple weeks now. I’ve managed to find all these to be working on the current update (1.6.3).
unlimited gems (500K with ease)
unlimited gold (sometimes freezes your currency which prevents it from updating)
unlimited keys
unlimited loot bonus
unlimited pickaxes
instant finish any timers at the research centre
these are game breaking features so I won’t be giving a tutorial.
I’ll try look into the requested features and see if they’re possible.
Edit: I've tested several iAP tweaks and exploits but no results. App tends to freeze or crash, purely server-sided.