Complex sentence: It had simple digital joysticks; it was almost fully backward-compatible with the Atari 2600 (and was the first console to have backward compatibility without the use of additional modules); and it was considered affordable at a price of US $140.
Split into simpler sentences: It had simple digital joysticks and was almost fully backward-compatible with the Atari 2600, the first console to have backward compatibility without the use of additional modules. It was considered affordable at a price of US $140.