I played this game for around half an hour. I didn't get really far but jumped across several planets, made some trades, etc. I understand the general gist of it, but if there's more than that it wasn't explained enough. What I did play however was fun and it seems to be an interesting experimental game with potential.
Viewing post in Cosmic Road Trader jam comments
The game will recognize if you have a save where you have one million $ or more, there really isn't that much more to it, other than the hidden factors that decide how populated by monsters the roads are (and of course the prices and inventory of the shops). The random tips you get on bootup pretty much convey everything you need to know to have a fair shake at accumulating wealth in the game.