For bumper boats, we want a struct that contains:
For one player bumper cars, just draw the single car (circle) in the right color, with the name shown in the middle of it.
Update the position, adding the velocity.
Change the velocity so that the circle moves towards the mouse click with a speed of 10.
Work out bouncing off horizontal and vertical walls separately.
A circle should bounce if it is on a wall and the velocity is moving toward the wall.