The ship has spinning rings, for artificial gravity.
But whenever you see people through windows in the rings, they are standing wring side down, with the feet on the inner side of the spinning rings.
At the intro, Shun wakes up and find himself deep in the space (3:45), and he is standing on where the ceiling should be. Space station rotates to create gravity, and this scene got that right, but the direction is wrong. The outer rim should be the floor, and inner rim should be the ceiling. In a later scene, the floor in a long corridor is pictured right, since it's concave.
At 11: 42, in blatant disregard for physics, the team of the main characters is seen through the spaceship window upside down relative to the direction of artificial gravity created by giant rotating wheels comprising the spaceship.