I wonder if different systems can affect physics in Unity WebGL build? Im not sure, when I play it, it works fine and it seems like the other guys who posted here got through it. I don't know, I'll have to look into it :/
Viewing post in The Worst Intentions jam comments
Tried it on my laptop. It worked there. I recored the strange behavoir https://im6.ezgif.com/tmp/ezgif-6-396abd0c4783.gif
