No, the spaceship isn't done yet - it is still being modelled (and could take some time for a model that big). However, in preparation, I did add an orbit area as shown in my last update, which you can now try out for yourself! This also includes several smaller improvements and bugfixes. Changelog:

• Added Earth Orbit
• Added placeholder oxygen generator - the model for this isn't done yet, but it is fully functional and you get it the first time you reach orbit. Check PAI's help for details on how to use it.
• Added metal ramps, brick ramps, and truss ramps (check the vending machine for a new blueprint)
• You can build worker bots in orbit - but they move as if there was gravity (because it was simpler that way)
• Items are pulled towards powered belts in orbit so they can travel along them
• Fixed truss water bug
• When mined, glass now returns the item
• Made it clearer which tool is selected
• Added key that enables/disables antigravity pack
• Pauses the game when not focused unless focus paused option is unchecked

What can you do in Aground Zero?

• Mine ores, gems, and other resources
  
• Build structures
  
• Rescue survivors
  
• Fight enemies and bosses
  
• Explore the ruins of Earth
  
• Upgrade your tools and Protosuit
  
• Craft items and automate factories
  
• Balance power generation and usage
  
• Meet some familiar faces in 3D
  
• Reach the surface, and beyond?

• OS: Any 64-bit
• Processor: 2.0 Ghz Dual CoreMemory: 3 GB RAM
• Memory: 3 GB RAM
• Graphics: OpenGL 3.0+
• Storage: 1 GB available space