Yes, that is a fair point, alignment to the sky may not be relevant at the ruins.
Although I would say don't be too quick to assume all ancient civilizations on Earth were primitive just because they are old.
One culture where alignment is profoundly used, was the Ancient Egyptians, even today we do not know how they built the pyramids.
The precision required to build the great Pyramid of Giza, is staggering, we would struggle to build an exact copy of it today, and that's with all our technology being used.
Lost knowledge does not mean advanced knowledge.
There are plenty of legitimate archaeologists who would argue for the methods used to build the pyramids being perfectly placed given the technolgy known to be available at the time.
The problem is that no complete records or blue prints remain from that time to give complete quick capsule evidence of how they were built. What we know has been pieced together from centuries of study.
This vacuum of absolute fact derived from absolute evidence over time has obviously given room for wild speculation and urban legend to develope. Tall tails ranging from Atlantis to Extraterrestrials.
Many legitimate archaeologists would argue very strongly that we have a good idea how of they were built. And yes we could build the same structures today using modern technology, when you look at structures like the Hoover dam and the Channel Tunnel.
Its also easy to forget that the Ancient egyptians were not the only culture to build pyramids, many ancient cultures did and for one good reason.. It's the easiest and most energy efficient structure to construct given the building materials available at the time. Wide foot print, that gets smaller and lighter the higher it goes.
Mountains and hills are not cubes... Gravity forces them to become mounds. They naturally find equilibrium.
We are off topic.
So back to more pressing matters..
Aliens!!! in space!!
....in a game.....