Good concept
This game seems like a progression of inevitability. What I mean is that upon playing through once, the only conclusion that seems achievable is evolution to the final age and installation of some ion rays that will destroy the enemy base in relatively short order, due to their extensive range every time the enemy deploys a unit, the rays will kill that unit and about a second of fire will slam directly into the enemy base, ending the game pretty quickly.
The enemy establishes sufficient defenses that in the earlier ages, destroying their base is downright improbable, and the nature of the game limits the number of available strategies.
Nonetheless, this game is very entertaining and an excellent framework. I think a successful sequel is definitely not out of the question.