Good but so many flaws....
Its a fun game, but gets very tiresome and theres a whole bunch of problems. As mentioned below, the Monstrous Blockade is for what exactly? As for the Giants Nightmare, having a unit that just does building damage is all well and good, until theres nothing to defend it. The powerups which you can get early if the Giants Nightmare is going at it does no damage to troops at all! Why? The DNA bonus the Assimilator gives you is neglible and it tends to bug if theres a troop which walks round to go into its mouth...then goes off the screen leaving the Assimilator sat there forever trying to attract a soldier that will never come...
The flying troops are next to useless even when fully upgraded. The Alien Lord loves getting stuck too. To complete this game, all you need is a swarm of upgraded grunts and a few Spiked Crawlers. Thats it. Wheres the tactics in that?