Fun, hope to see more.
2 Things:
1. The first gold pile underground throws the gold into stacks. If they feed into the treasury, like the others, it needs to show it. Otherwise it should feed into it. Right now it looks like wasted dwarves.
2. 4th level, right has what looks like a library or control room and a bunch of crucibles on chains but neither seems to have any controls to add dwarves or upgrade them.