Endure might be the best racing game on the 2600 but definitely not the best ever made, you know, what with modern sims like Assetto Corsa and BeamNG.Drive being a thing.
It's definitely in my top 5 racing games of all time, and in my top 10 2600 games. I might give Metropolis Street Racer and Outrun the edge, but Enduro is a mighty fun game.