The speaker sounds are very goofy! The game did run poorly on my PC (3FPS fullscreen) and I was forced to play at 18 fps (not fullscreen). I also found it a bit hard to see what was going on due to the large amount of effects. The game did make me frustrated, so you achieved your goal.
Thanks for playing, sorry for inconvinience, this is bug you encountered. I have tried experimental WebGPU build inside Unity. I tried it because I was using VFX Graph on GPU. But I think there is something different wrong there. Could you tell me what is your computer specs? You need a little bit beefy computer because of too much going on. Also could you try those demos, how much performance do you get from these?: https://www.keijiro.tokyo/WebGPU-Test/
I cant tell anything without inspecting your computer but I believe instead of Nvidia GPU it uses AMD GPU for browser hardware acceleration. I have RTX3060, Ryzen5 3600 and 16GB RAM, worse than your specs. It is really strange that you get 3fps on fullscreen, I get V-Sync 60fps. I don't think internet is a problem but like I said I am not sure, this is experimental graphics at the end. You might ask why am I obsessed with that, cuz I want to push how far can I go with WebGPU. Thanks again for taking your time, and sorry again for inconvinience.