Yeah the controls could feel very sensitive since you can change your direction by 180 degrees by just moving a few pixels, I never thought of that when I play tested it.
Chocolate decreases your HP since they are poisonous to cats.
Fish would increase/decrease the cat's movement speed but the values I used seems to be too low.
As for milk, it's supposed to make the screen go white making it harder to see, but right now the values I used for them is 100% too small.