I'm new here but to me it seems that playing on the web is preferred. Although downloads can be used too - at least that is what I plan to use as I do not know how to make web builds with pygame...
Someone on another topic here when answering about the use of Godot said: "Usually, yes, but for a gamejam you should use Compatibility mode so you can export a web build. Web builds are what get your game played a lot more, faster, and easier to access! Also, keep in mind you can't use C# for web builds, only GDScript, which should be fine for a gamejam. But ultimately, you can use anything you want 💪, it's your game, remember to have fun with it!"