I've been helping test https://gasgame.net/ . It's pretty early in development and somewhat unpolished, but it seems you haven't gotten many replies here. Desktop, multiplayer, no mobile support, top-down tank combat game. Wouldn't say thrilling though. No login needed but you can create an account if you want to save your progress. (I really don't like a browser game to require an account before I even try it!)

No this pretty much does it for me, it's a thrill here. lol. Thanks for sharing the link, that's cool. I really liked the autofire by default, great idea. (I feel like I used to play another game that did that, and loved it, but can't remember the game now)

I stick to good old slither.io

It's a fun game, thanks for the reminder. I would love one where the screen shakes and there are SFX and stuff. Kind of like 3D Roam for the C64. https://www.youtube.com/watch?v=hujTp8yA6QM

Too many cheaters and the performance is horrible. It's a fun game otherwise.

Here is a list of indie browser games you can search through: https://itch.io/games/platform-web

Something like this ? https://poki.com/en/g/blumgi-ball

Should be playable on mobile as well. Poki is an excellent platform for web games and I think Blumgi games could be a good fit to what you are looking for.

Any pinball simulator will do. The game is all about lights and action. Though the really good ones aren't built for web.

Pinball's cool, but I'd like one where I can get a few shots off while I wait for the ball to roll downward. ;-)

https://ev.io is quite good.

Tankwars.io. Steep curve for newbs but in a full room of players is awesome

Mobile browser or desktop browser?

Desktop in this case, though I wouldn't complain about adding more mobile browser games to my phone.

Amorphous+

Is it a Flash-based game? I just see black screens on NG and Kongregate

You can still find webpages that run an HTML version, but they're a bit scuffed. Better would be to use Flashpoint Infinity.

Check out hexanaught.io

Super fun

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