Starting it with A6 is probably a problem, it is build with A5com.

I have done a much better job on the rework, concerning groupmovement,
but the old demo works good anyway in this part.

The AI is fairly simple, ist just builds up the base, collects ressources, and
then does rush-attacks into the players base in certain time periods.

If you want to reduce the AI hardness, you need to make the rush-cycles longer
(somewhere in the code)