I think the others above have pretty much covered it, so I'll just add a few extra points:
- Rather than "OGL" as a tag, I think "5E OGL" would be more helpful - because a) it makes it clearer which game system applies and b) there is more than the one OGL. I think 3.5E had an OGL too? And so does Pathfinder, though that might have a different name.
- "Physical game" can mean a few things. Most of what I write is RPGs and RPG supplements, but I also created a print and play that is more of a storytelling game. And there are some card games or board games in there as well. So maybe additional categories for those? I don't know what sort of labels would be helpful, so maybe someone else can make a suggestion.
- Creator resources might be another useful category. I'm not sure if that's in scope of Itch, but I'm thinking things like stock art or templates for RPGs.
- Is there a way to add print on demand functionality to Itch, such as partnering with another platform? Or even the option to purchase a hard copy and have the creator handle printing and shipping? This might be a longer term one, but I thought I'd put it out there.
Hope that's helpful.