I don't think that was running on Rosetta 2's dynamic recompiler, but instead used Rosetta 2's other stated feature of being able to translate existing apps at

I don't think that was running on Rosetta 2's dynamic recompiler, but instead used Rosetta 2's other stated feature of being able to translate existing apps at install time. In the demo they state that they downloaded the game from the Mac App store. Certainly static recompilation yields somewhat-close-to-native performance when it is available, but that is not possible for x86 "VMs".