There is no registration process to unlock this game. Collect all the goo to restart the hive, then you will be able to use it to create new bugs for your armies. If you and your opponent are both trying to take over a hive, the player who's bugs collect most of the goo get control of the hive.
Hives have nasty defenses which are very powerful, and long range.
Their weakness is that they cannot move. If possible, attack with bugs that have a longer range than the hive defenses such as sniper spiders, cannon beetles, and missile spiders, but be careful your bugs don't inadvertently get to close to the hives. If you don't have any of these types of bugs, you must attack in large numbers. Machine-gun Wasps, Black Widows, and Shrapnel Beetles can be very effective against hives in sufficient numbers. If you don't set this attack up correctly, your bugs may approach in a single-file line and get mowed down.