I didn't hear any sound in the web-build, which is a shame, cause there's some excellent potential for Really Juicy Sounds in this game.
I love the core mechanic, and the shooting and swinging both feel really good. I will say that there is a bit of a bug where shooting the harpoon into things automatically pushes your car to be perpendicular to the point of contact -- I used this to get out of a couple jams, but it may not be exactly the physics experience that you want.
But other than that, this was a really fun game! Keep up the great work!