Not sure if you are planning to update this one again, Intradom, but I have a few suggestions:
~ A quick tutorial that explains a few things, or a simple "?" button somewhere with this information would be a big plus. (Workers, tools, gates, ore tiers)
~ Freeze Workers Button OR Worker Menu - Trying to chase down my workers to give them better tools was an exercise in futility for a couple minutes there. Either a button that stops workers from moving/mining or a menu that will allow you to switch their tools would be nice. Also might help if a player accidentally gives a worker their tool without meaning to.
~ Disable UI - An option to disable the UI would be cool, for focused gameplay. Just gets rid of the tooltip at the bottom when hovering and the top bar, allowing the player to see more of the screen at once as well.
All in all, a very fun little game. I played it some months ago but at that time I never knew you could get tools from the vending machine(?) in the corner of the first room, so it was a slow and frustrating experience the first go around. Glad I came back to this one.
Cheers,
Drake