If you haven't already read the documentation for the SUGAR Engine, it is highly recommended that you do that first as that is where the core concepts are explained along with a demo and other useful information.
All documentation can be found here.
With the key areas being:
See the LICENCE file included in this project.
Can be found here
Can be found here
Commit hash: 8052283f57db7657b3a905468fcd3cc5c1839b52