The lore reason for the wall running is that the hangar is normally a zero-g environment, but the gravity machines aren't working properly and BSI Industries still needs you to hit your shift quotas. The real reason is that when we started development, the two programmers on our team decided to split the work, with one of us adding fun parkour movement and the other adding the ship building. Later on, we realized that there was no need to parkour if the player could just walk around the ships, so we decided to remove the floor and go for a star wars-esque chasm station where you've got to wallrun around. XD
We ran out of time to expand on the tutorial, but I think I'll add an "Instructions" section to the itch.io page.