Didn't really engage my attention...everything looks somewhat "linear." Same old "build and destroy (+/- kill critical units)"
If the green humans would just get up and work instead of just standing there, they might have a chance. And you should probably have not started with Zeus (gives pegasi) and disabled Apollo's underworld tunnel--all I did to get to Theseus was to fly my pegasus to him and get a tunnel going, then kill him. Bypassing all your hard work in front of the human settlement. :]
What are those guardians standing there for?? You could have done a little bit more with the Amazons (I thought they were primarily horsewomen, not toxotes?)
Map Design: 3
Again, some elevation, eye candy, etc would have improved your map vastly. It's functional but a lot of wasted space south and west.
Not much of a story right now, but hopefully the sequel will be better.