The art was great but what I really liked the gameplay. It was simply to pick up and hard to master, which is exactly what you want from an online game. Great job.
Everything feels spot on in terms of design and the technical side of things. I think some more thought could go into the gameplay (adding some additional objectives, etc), just making the game feel complete. I know these minor things are difficult to do after that sigh of relief when you realize you might actually get to release.
You mentioned the performance issues but I think moving the camera would be a great improvement. I found myself either shooting somewhat blindly or having to slow down to destroy the bases.
Also, consider making Q and E the strafe keys. It's where most people expect them to be.
Still, I was impressed and it was fun. I'd love to see what else can be done in 3D.
*PM me, I might be able to help you with an AS3 preloader.
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