3D is not the issue. I think 3D is constantly overdone. 90% of all gaming software are 3D shooters which amounts to Doom V.2,000,094. It gets OLD. Almost all of them are IDENTICAL except for the graphics. Shoot this. Grab ammunition. Shoot that. Grab MORE ammunition and a bigger gun. Shoot some more. Open door. Shoot. Shoot. Shoot. Brainless, repetitive garbage.
The Star Wars FPS games were a breath of fresh air because suddenly you could interact a lot more with the game. Being able to pick bad guys up and throw them off cliffs was a novelty, but where are the sequels? Some of the best games I've ever played (whether it be on Intellivision, Colecovision, the Commodore 64 or the Commodore Amiga were mostly all 2D games). What happened to the old Lucasfilm Scumm games? With the exception of Grim Fandango (Monkey Island 4 kinda stunk due to how bad the 3D looked), they were all 2D games. Why are the all the good games abandoned in favor of more 3D war shooters?
But here the problem is not 3D versus 2D but rather it is simply that platform games need joystick support. No one wants to play a platform game with a keyboard. Add joystick support and more people will buy the game. It's that simple.
As for fairly recent Intel Macs having trouble playing the game, I can't help but point out to those that say PPC chips are ancient and crappy how smooth this game plays on my "ancient" G4 at high resolutions even running the latest version of Leopard (which definitely seems to be the most stable Leopard yet here on my PowerMac). Maybe they're not as old or crappy as some seem to think. Clearly, the GPU is the biggest stumbling element on computers in the past several years, not the CPU.