This week I refined the building system.

Added a build mode that allows the player to switch between creating/destroying platforms and using them.

Platforms require 1 carbon to build

Platforms can now be picked up with Lshift + right-click

Build ghost and platform will change material when hovering the mouse over them while in build mode.

Minor update for the star generator:

The star has two phases: burning hydrogen and burning helium.

During the first stage, the star will burn hydrogen into helium. 

There is a short transition between phases and the star will change materials to reflect the change.

During the second stage, the star will burn helium and create carbon and oxygen.