Yea, really good!
-tutorial is completely functional (although the standard AI voice.. could be improved)
-progression of maps in the 'campaign' is reasonable and works well, also nice variety in the maps so far
Suggestions:
-something like a map randomizer (shuffle starting positions/cities for factions on a map) could add quite a bit more replay potential.
It is very good overall though. I've seen a couple of recent games trying a similar idea and I think this one probably is the best overall!