The start of the game is functional and playable. The core of the game is polished and makes sense.
This encorporates a tutorial, showing the player how things work, the ability to set things up.
In terms of polish we will need things like:

• Icons / warnings for when things are unpowered
• The ability to relocate placed structures like generators
• Better equipping and dropping pawn items
• Assigning jobs to people
• A UI that displays pawn health