Yes! I changed the player acceleration and deceleration speed both to 1,000 pixels per second (which basically doubled them both). I think it's much better now.
I also tried to change the scale, but every scaling option I use, ended up in the game not even appearing, so I'm stuck with letterbox integer scale. (I fear toying with that even further because I've already done a total of 10 different uplaods with this, supposedly, simple game.) Also, I think this issue pertains more to the options I chose upon first implementing creation (so, it'd be a big overhaul).