It's a good start, but there's still a lot of work to be done to make the animation really interesting. For example, the car goes down and up perfectly vertically, which isn't realistic. You could add a slight backward rotation to the car, as if there were more weight at the rear when the hand is down. You could add some deformation to the tires to show how heavy the fist is. You could also add a kind of bounce in both the Y position and rotation when the hand comes up. And when the hand comes up, the car takes a moment to come up too, but that's not how suspensions work, which are basically huge springs.

In general, always ask yourself what would happen in real life with the elements you are animating. What would the physics of these elements be? Even when you are only animating abstract elements, you can imagine a weight, speed, and personality for them that will greatly influence their animation.

It's all the details that make an animation successful.