Which part of the controls were janky? I’ll see if I can fix it.
When you hold and release left arrow or right arrow button on your keyboard, the player keeps sliding in that direction. I don't know if it was intentional for the extra difficulty, but to me it seems a bit janky.
Sorry for the late reply, that was intentional, although now that you mention it, it is a bit annoying, might change that in future to be less slidy.