For Mac Chrome users, there's a pretty simple workaround to get this (and other Godot 4 games) to load without making the browser freeze for minutes.
Type chrome://flags/#use-angle in your address bar and hit Enter, and then a settings page will load where you should see a section at the top called Choose ANGLE graphics backend.
Click on the dropdown next to it and change the value to Metal. You'll be prompted to let the browser restart. After it restarts, you'll be able to load and play this great game with no problems. Enjoy!
P.S. This also works for other Chromium-based browsers, such as Opera, Edge, Thorium, etc. If changing this setting causes you any problems with other web pages (it hasn't for me), you can always change it back the same way. Just return to that page and choose Default or OpenGL instead.