Oh crumbs! I have no clue why it's working for me then... It loads on my phone too, but isn't playable due to the orientation unfortunately.
The only thing I can suggest at the moment is you make sure Chrome is updated.
Viewing post in Crab Racing! jam comments
I've also uploaded a post-jam version without the fonts, it doesn't look very good, but it works! :)
https://nylepudding.itch.io/crab-racing-post-jam