From start not clear how to play. But later after 20 waves+ it looks nice. This silicon-gflops mechanics and especially how the AI works very interesting. After i see how the plane moving in same way i`v started to build base vertically in four columns and many rows.. and planes starting to flight and attack vertically. Exactly all over the base. One thing just a bit annoying about how to make building queue in later game when i have enough silicon to make queue for 10 Refiner`s . If i press on floor its ok i can click 10 times in same time, pick it, and click on the map to build 10 pieces. But until first Silicon Refinery finished, cant add another.