Fair Enough. I do the same thing. Last game jam I got 70 reviews by doing that. This one I did 30 in the first two days. I just found out itch compiled a page of all my devlogs for this jam if you're interested later. Katamari Mech Spacey DevLogs There are code snippets in there, as well as a lot of other information you might find useful as I see you're trying to do this professionally.
Also to be clear, the background is not moving in reaction to your movement. It's the asteroids and ships that do that wahen you hit them with your Frankenship. The background just moves in the same direction slowly, no matter what. Making it react to the player's movement caused it to look like you were entering warp speed and was even more confusing.