HighBorn (iPhone/iPad)

Anyone still playing this one? I noticed it just went on sale and am thinking of picking it up.

I stopped playing. It seemed OK at first, but once I scratched below the surface I realized it was not a very well made game.

Any tips on the last mission, with the four gates? I can get three gates closed if I really push the pace, but if I delay at all, I get absolutely buried in enemy units, and I can never get the fourth gate closed.