Might just be the most well aged Atari game ever? It's gameplay loop isn't going to hook you for double-digit hours, but its mechanics encourage a lot of skill building. It's also one of the nicest looking Atari games, using a limited color pallet to make sure the threats pop while the enviornment stands out nicely in the background. Even the cheesy "Tarzan yell" emits charm, although it can get annoying after awhile.