For these competitions, I feel like you should use web builds if you want to do online multiplayer. I couldn't play this as it was raising flags from my firewall. i checked out the codebase though, congrats on getting that set up!
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Afaik, if I do a web build, I'd need a server to link up clients, wouldn't I?
But yes, I agree, if I wanted more people to play it, in-website playable is the way to go (just wasn't possible for this one afaik)
And yea, checking out codebase is a smaller download too. But you need to have your own build tools set up (ups and downs /shrug)