Gotta confess I was a bit disappointed that the game requires a 64-bit PPC, but it's only fair; we're going for 64-bit graphics, after all. But still, the fact remains that this is probably the jam with the most Mac PPC games in the history of itch.io! (my game runs on 32-bit PPC).
As for the game itself, it really nailed the visual aspect of the N64! My only criticiscm is that the backdrops fade too quickly under the fog, dispelling the illusion. I also could not find any arrow?
Tested the game with both a Macbook 08 and a Mac Mini 07, both running Lion.