You've already done it :) I think all you need to do is edit your game page and click the checkbox under the WebGL version for playing in browser.
[edit]
I made a quick demo to show that the webGL version can be played by browser, and because I'm impatient lol.
You can see it at https://games.dancewiththedevil.net/test/index.html
PS I'm not trying to steal your game. I'd be happy to host it for the duration of the game jam if you like or delete it right away.
I tried out the game but I don't know if I've found a bug or doing something wrong. It seems like the torpedoes are having no effect on the enemy?
Very beautiful game.
[edit2] I've removed the test version since you got it working on itch :)