Fun little entry. I love the minimal aesthetic, and I love the discovery of searching for high and low prices among the stars. I think this game would be amazing is you extended it into an Oregon-Trail-esque interplanetary mercantile experience. I'm imagining fuel being required to move between planets, random text events ("Meteor shower! You take 5 hull danage!"), and perhaps even fun beeps and boops for sound.

I played it on Firefox and didn't experience much performance slow-down. I do wish it had an end condition, though. I stopped after I made a hundred or so silver.

Thanks for the fun game!

Nice idea for a game, now to explore the possibilities of how to make it more enticing! good luck and keep on jamming!