GDD:
Simplicity is nice, but a more defined timeline would look better.
Theme:
You may want to find another way to finesse this point, it isn't super convincing that the game matches the theme.
Music:
Volume is way too high off the bat, turn it down a bit?
Gameplay:
Game feels very repetitive, I would add other interactions to boost the gameplay. Perhaps you can click the arm to prevent the other character from getting grabbed?
200 feels very lengthy. I suggest bringing it down to 100 or something much lower as the gameplay doesn't change other than speed.