It's been a while since I played, but I've picked it back up a few times, let's see how well I can explain it.
Duskers is at its core a puzzle game. It could be executed just as well with an ASCII rogue/nethack style UI.
At its core, you have a few different drones that have some basic capabilities, and you can outfit them with a few additional capabilities (modules) each if you find components. You choose derelict space hulks to salvage, and once you enter them, some rooms/doors will be locked, or unpowered. You have to choose what rooms to go to to unlock and power other rooms. Some rooms may have unknown in them, which may attack you at some point when you're in the room, or if you leave the door open move to other rooms. Some drones can detect movement, some can't (IIRC). Sometimes you need to herd those lifeforms between rooms by remotely opening and closing different doors. The drones look for scrap in rooms to gather, which is used to build modules.
The rooms are all numbered, the doors are all numbered the drones are all numbered. You control the drones and parts of the ship you have access to through command line options, which have shorthand equivalents. e.g. (the below is mostly from google/gemini since I didn't want to go look them all up to remember)
navigate 1 r2 — Moves drone 1 to room 2.
navigate all r1 — Sends all active drones back to room 1 (the docking bay).
move 3 r4 — Uses the shorthand move instead of typing out navigate.
d12 — Toggles (opens or closes) door 12.
a2 — Toggles airlock 2.
close d1 d2 — Explicitly closes doors 1 and 2.
close all — Closes every single powered door on the ship immediately.
close r3 — Closes all doors attached to room 3.
gather — Tells the active drone to harvest nearby scrap metal.
gather all — Orders the drone to systematically harvest all scrap in its current room.
generator — Connects a drone to a power inlet to restore power to a room's grid.
interface — Connects a drone to a powered terminal to extract ship logs or systems.
tow 2 — Forces drone 2 to attach to or detach from a salvageable object (like an upgrade or broken drone).
stealth — Actives the stealth utility to move through rooms undetected by infestations.
You can string multiple commands together sequentially by separating them with a semicolon (;). Each drone operates its queue in parallel.
navigate 1 r3; gather all; navigate 1 r1 — Drone 1 goes to room 3, sucks up all the scrap, and drives back to safety.
navigate 2 r4; tow 2; navigate 2 r1 — Tells drone 2 to go to room 4, hook up a towable item, and pull it back to the airlock.