Civilization The Board Game, next version

Introduction
I deployed a new version of my computer implementation of  Civilization The Board Game. The implementation consists of three parts:

• Civilization Engine 
• Civilization Web Interface
• Demo. Demo version is deployed to Heroku, free quota. Please wait several minutes unless the dyno is brought back to life.

New features

• Greeting window more verbose
• Research, building up technology tree

Greeting window

Civilizations tiles more descriptive. But that's description only, civilization capabilities, government and technologies are not implemented yet.
Technology tree
The player can spend trade and enhance technology tree.

The current technology tree can be reviewed any time by clicking technology icon. The player can also peek opponent's achievements on this field.

Unfortunately, the thumb is down. The technology abilities are not implemented.
Next steps
Producing unlocked buildings.