I am neither a sound engineer nor a musician, so take my words with a large grain of salt.
Many of your sounds, between Beam 1 and Gun 3, are on the quiet side. You seemed to realize this when you made the latter sounds though.
Gun 2, to me, shows some promise. I can imagine it as an energy weapon; it has a low pitch that seems to aim to be, but just barely misses being, sinister. I wonder what it might sound like if you raise the volume and lower the pitch slightly.
Beam 8 has a similar effect, for me.
There is one mistake you keep making for the "Gun" series of sounds... Weapons like the Storm and Hail Chaingun are the uncommon. In most cases, Nova creates one shot at a time, yet your "Gun" sounds are tailored to multiple shot weapons. While Nova can create many shots in a single frame, Nova can only show 128 shots on screen at a single time, so the use of this feature is uncommon (A maximum limit of 128 shots sound high, but when you have epic battles with multiple carrier-based fighter squadrons throwing their weight around, those 128 shots disappear fast. That's without automatic weapons.). Basically, single shot weapons are more likely to turn up.