Great news! I’ve implemented your suggestion in the v1.1 update (releasing today). Now, when you stop the paddle, the background doesn't freeze instantly; it keeps a slow, 2-pixel 'kinetic drift'. It looks much more natural and adds a great sense of motion to the game.
I had to be careful with the 2-pixel limit to keep the multi-color patterns stable, but it works perfectly. Thank you for helping me make the game better!