Hello thank you for playing and giving proper insight :) Soon after seeing your comments we gave more insight we gave more information/hints in the game description. Originally we wanted to make a proper tutorial with the voice from the intro, but we ran out of time.
To answer the gravity part, the location is a spinning space station. gravity does not exist in the center axle but it does further out. This is the case with real space station that uses artificial gravity.
As for escape, there is a teleporter on each of the floor that you can freely teleport back to base with all of your loot, there is an emergency teleporter, but it only teleports the player and nothing else. The end goal is to find the "interesting something" the intro narrator mentioned.