I think these are looking great. I love the idea of A and B sides. Have you considered the thought of a different inlay (dancing pose and/or moon phase) for different denominations. I know it will take more time to design but in the end could look phenomenal. for example maybe use a moon, and gas lamp like you already have, and maybe a campfire dance, barrel fire (think hobo camp) dance, or fireplace dance. That's all I can come up with right now obviously there are more nighttime lighting options. I think you would definitely keep a moon in the back ground of each of them though.
I agree the that middle inlay in the set of three chips is the best IMO, the charcoal being #2. maybe you could try a black outline on the yellow moon and see if that sets it better, right now it feels bright and distracting from the rest of the inlay. Or even use the same color for the moon as the glass in the gas lamp it is much more subdued yet adds a tad bit of color.
I also second the idea of a smaller crescent moon in the background of the gas lamp inlay, and back the fog down a little on the right side....it almost appears to be a ghost like apparition, and a little distracting.
ETA: maybe use different moon colors but keep it somewhat subdued natural colors; whitish, yellowish, blueish, pinkish; i.e. don't use a GREEN moon; to my knowledge that is not a natural color. If you chose this route maybe you could use an eclipse as a bounty or something. Just throwing some ideas at you, hope this helps.