It's a diorama of a coal mine of the 18th century.

You can order the lift to different mine levels using the buttons in top left corner.

I was hand-drawing all the art assets  based on historic illustrations of the mines back in these days. The simulated machines were also created based on historic documents, describing how these early steam- and coal-powered mechanics worked.

Hit F11 once the game has been loaded to switch into full screen mode.