Hello,
Yes, that's where the demo ends. We'll be releasing an updated version when we can, but even then, it may not contain any extra content. The next public release of new content will likely be upon the game's full release.
The system requirements are just:
Windows System Requirements:
• OS: Windows XP
• Processor: 1.66 Ghz
• Memory: 1 GB RAM
• Graphics: DirectX compatible card
MAC OS System Requirements:
• OS: OS X version Leopard 10.6 or later
• Processor: 1.66 Ghz
• Memory: 1 GB RAM
• Graphics: 1920x1080
Linux System Requirements:
OS: Ubuntu 12.04 +
• Processor: 1.66 Ghz
• Memory: 1 GB RAM
• Graphics: 1920x1080
Thank you! Hopefully, it'll be done in a few months.