I feel like there is a veeery slight delay between when you press a key and when you start moving or ramp up speed, and likewise there is a small delay between when you lift the key and stop moving, or when you suddenly turn from left to right. Does movement have any acceleration, or is it instant? I think it may be compounded by two things: Shinmy not having a walk animation (granted, because she's in her bowl), making it feel like she is sliding; and the subpixel movement when you go fullscreen. I noticed you are using Godot, and there are some settings relating to that last point, but they changed in Godot 4.x so I'm not sure how they work now. I know that in Godot 3 you enabled 'viewport' strech mode, 'keep' aspect, and GPU pixel snap in the project settings, so that your game scaled in a pixel-perfect way when you change the window size.