I’m lokking for this movie that I remember seing on tv in the late 80s early 90s. I don’t remember too much accept it had a boy or a guy who had a tunnel appear  in his house. And he drove down it in a weird car. It may have been like a go cart. I forgot to mention that the tunel was a black and white spiral spinning around. And I believe it lead to an animated world.

The movie ended with him returning through the tunnel in the car.  That about all I remember.