It is 2D real time strategy game, with semi-open world multiplayer and sandbox elements, styled with pixel-art graphics.
Imagine if "Factorio" had a purpose for those factory production, rather then achieve top technology and finish the game. For those who didn't play Factorio, in this game you rack your brains to build facory layouts, combile simple things to make more complex. It very similar to any engineering in real life or programming. You could have good solutions that are efficient and extensible or have a huge mess. This is all fun to play.
Now you will have a reason to build factories: assemble vehicles (probably including creation of unique setups, weapons/modules) and use them to defend or attack other players.
Game world (planet) divided into sectors. Players will spawn, scout and capture new territories, collect resources, manage logistics of resources and forces between sectors, create alliances or fight with other players, trade.
Often in competitive strategy games opponents have super simmetrical condition at start. Therefore success depend on how fast you are clicking and solve more problems in less time. There can be different approach, where all player's beses exist in the same game world, and simulate seamlessly 24/7. And even if you are offline your bases, resuorces collection and factories continue to operate.
I never saw this idea implemented anywhere. Until I found a game Screeps, which I very liked. And this game proves that concept.
As players will came to game at different time and have inequal progress and power in the game, there need to be some ballance. This aspect deserves a separate discussion. Check "Game mechanics" post to understand that idea more.