Dual 1.4 GHz G4, running version 10.4.10 with 1 GB or ram.
Also using a wireless Logitech keyboard and mouse, although I doubt if that is the problem.. but then again, if I knew what the problem was I wouldn't be asking for help.
Heh, actually trying to do that. I've got so many boxes of assorted computer crap that I'm actually having trouble finding my old keyboard. lol. As soon as I do though, I'll let you guys know if it works or not.
that's really odd.... if you were a Windows box I'd suggest reinstalling DirectX or something, but I haven't a clue about OSX ...though it sounds like some sort of driver that gets loaded for games, similar to a DirectX, is broken.
I do believe that I tried both and got the same results (a.k.a. no keyboard controls at all... hell, not even any keyboard recognition unless it involved base Apple commands like Quit, or Application switcher).
Still in the dark about how to fix this, and numerous internet searches have turned up nothing.
Try making a new temporary user account for you on OS X. Then try playing from that account. If it works, then there's something that you have installed (or some settings set) for your account that cause it.
if you have DiskWarrior, I recommend giving that a run. Even then, grab a utility program like Cocktail or Onyx and run all the system maintenance stuff.
I'm going to go out on a limb and say, "Permissions issue?" though I HIGHLY doubt it.
I'd get an app like Cocktail or Tiger Cache Cleaner and wipe your system logs and what not. If you're a UNIX guy, just save yourself some time and do it from Terminal.