How it distinguishes houses and geological formations from enemy targets I don't know, but it's a fun and powerful weapon nonetheless. The laser is a long range weapon which fires a laser-beam at your target. It's very effective but requires pin-point accuracy. Another advantage of the laser is that it can shoot through shields. The nukes speak for themselves - massive destruction, so keep your distance.
All weapons have unlimited ammunition and they are diverse enough to make the game interesting.
You will have to learn which weapons work best under different conditions. Missiles, for instance, don't work very well underwater. Plasma and laser, however, do. Two of the weapons available. You can also pick up a speed booster which allows you to fly faster.