I am absolutely delighted by stuff like this.
The fact that this all started by finding out there's an atime equivalent in finder is great.
Now i wonder, is there any way to react to arrow keys being pressed, or does finder allow you to use wasd to jump to specific files starting with those letters and react to that? That would extend the possibilities of games run in finder, and if you choose a game that only updates when pressing buttons, like rouge, you wouldn't even have to worry about the fps limit.