Better analogy: Science tries to understand the game and where it comes from. Religion claims that some guy talked to the game developer, and therefore we all have to obey everything he says.
The purview of science is limited to phenomena that can be observed or experienced. The purview of religion (specifically theology) is that which cannot be explained by science (now or ever)
All religions have a creation myth, but religion cannot be reduced to just the creation myth. That would just be deism which is basically a form of atheism. Religions believe that supernatural forces actually affect the world.