Surely this must have been a completely different game at some point - it's just too weird (recurring mini boss, Darth Vader, transforms into different monsters) and irrelevant (Luke doesn't travel to a mountain or ice planet in A New Hope) to have been initially crafted for the first movie. It does have a similar force power mechanic to Empire Strikes Back (NES) though it debuted half a decade earlier, and the graphics are admittedly impressive in some parts. Overall boring, though.