Big things still only accelerate at 9.8m/s^2, so proportionally they should appear to fall much more ‘slowly’ than small things. i.e. a 100 metre tall person would seem to fall very slowly like he’s on the moon.
In the current game version, upon death, the Quarks topple over very quickly, making them look very small.
Because of that, even if the animations of your M.A.S.S. take big lumbering steps, they still feel very small (child sized) due to comparison.