Don't worry too much about the browser thing, I'm sure this is more of Unity's fault than yours. I've played other unity made entries on edge with no problems, but judgind by the logo on the splash screen I think you're using a different version of it that ended up having this problem. (I have no idea tho, I don't use Unity lol)
I'm glad you're still happy with what you've done tho, after all, yourself is always the only person you must always satisfy, at least that's how I think. Hope to see you participating in more jams in the future, they're nice to improve your deving skills and discovering your own limits, and just having some fun with bideo games. (Tho stay alway from the 2 day ones, I don't like them lol)