Ability to Exchange Lesser Keys for Greater Keys

A great feature for the game wouldbe the ability to exchange my lesser keys for greater keys.

10 Wood = 1 Iron
10 Iron = 1 Golden
5 Golden = 1 Ruby
5 Ruby = 1 Diamond

Even at 3:1 for all of them that likely wouldn’t be worth it.

Wooden keys are already the hardest key to get in the game relative to how many are needed.