Tried a two-player run-through of World 123, which is the suggested starting game for Friedemann Friese’s 504. It worked fine but it was pretty fiddly to set up and I’m not sure whether the payoff of game enjoyment over set-up time might be low and make me reluctant to get this to the table on a regular basis.
I also need to research which of the worlds are reckoned to be the best in terms of gameplay so we can see it at its best. Plus the rulebook / book of worlds is horrible and not easy to follow. Perhaps I need to see a decent video of the gameplay for another world.