Honestly I think this clone is insanely good! I also think the fact that you decided to use 3D models instead of just reusing sprites is really praiseworthy. I love the way they look! I also really like the trail that the targets leave behind while driving.
I think one small mechanic you could think about implementing is allowing the player to redirect their bullets. In the original game, when the player shoots a bullet and steers right, the bullet actually steers a bit to the right as well. This made aiming a slightly deeper skill, and I think something like that would be useful in this clone! Because everything is 3D, the scale is a lot bigger, so I think having more control over your bullets would work well.
But again, I think this clone is super fun and well-made! Great job!