Hm, well my firewall is off and I still don't hear anything. Regardless I'll continue to try this game out!
Edit: Well i got some more things to report/comment on: First I love the backstory haha. Second, inventory and item manipulation is a bit akward, IMO there should be some key shortcuts to automatically use each slot in your inventory -maybe just customizable keybindings. Secondly, and this is just something I thought of, it would be awesome if some of those monsters said things during play(squirtle and charizard come to mind). Lastly, I've been having some trouble understanding how to attack with certain weapons, the targeting system is a bit strange -again customizable keybindings would be great. Particularly the flamethrower -am I supposed to not be able to attack monsters immediately adjacent to me?
Anyhow, I'll continue to report bugs/whatever for me and my friends.
About the sound: I tried it here on a freshly-installed 32-bit Win7 netbook, and sound works out of the box. (After I clicked the 'unblock' button on the firewall popup dialog.) Strange that it doesn't work for you.
Sound also works on my 64-bit Vista system, so I guess it isn't some weird 64/32 bit bug.
I'll try experimenting with settings more.
About the customizable key bindings -- good idea. Actually, it might even be better to let the user 'tag' certain items for quick access. This should be easy enough to grasp and shouldn't clutter the list of keybindings too much.
About targeting -- yeah, all ranged weapons have a minimum and maximum range, so, for example, flamethrowers and shotguns don't work on targets that are right next to you.
I'll make this more obvious in the next release. I agree that it's too confusing as it is now.