So to me, it seems like most games with low ratings are the ones that haven't uploaded any WebGL version to play (neither itch.io nor Ludum Dare self-host, which works great for us, btw)

It's not a request but more of a suggestion - please upload a WebGL version of your game if you want higher exposure and ratings! Honestly, I want to play as many games as possible, and starting to download and unzip (and then deleting it, too) isn't working for me, so I can just find another one that I can play by simply pressing a single button on the web.

IMO, that's the way to go, it's a tough competition to get noticed, so make it as easier as possible for the players!

Good luck, everyone! Also, I would be glad if you would check out our roguelike-space-physics deliveries game - "Orbit Express", rate and comment with your feedback (we're keeping uploading new versions every day according to commenters' feedback): https://ldjam.com/events/ludum-dare/53/orbit-express

Cheers :) :)