At first I spent a lot of my time on creating the levels rather then smoothing out the player movement. Then when I got some other people to playtest the game, they said the same thing as you, but I didnt want to experiment with new numbers so I decided to leave it there. I'm gonna be making a post-jam version where the border will teleport you to the opposite side of the screen, plus some more polishing and focusing more on the player movement.