Hi there~
I would like to share some ideas to make Iron Lockboxes more interesting~
They have the potential to make a lot of money for OOO, but right now such Lockboxes just aren't attractive enough.
So here are some ideas to change that:
Bigger variety
At the moment there are only 2 types of Lockboxes that need a key to open. Those are the Iron Lockboxes and Mirrored Lockboxes. Both are acquired through the price wheel at the end of a level.
There should be more different Lockboxes, each with their own rewards~