The game needs boob physics TBH
like they should actually move around at least slightly instead of just being insanely stiff
especially when you aren't wearing any clothing.
although that's a low priority thing, but it would be cool to have :)
actually, with how small the sprites in this game are, it would look very silly to give the females boob animations. imo the breasts are already exaggerated, but i can understand exaggerating them to get the point across that it's a female character.
also it should be noted that with good support, tits don't really jiggle when you walk. they only really move dramatically if you have a very large cup size, but not everyone is over a D cup. really, the average cup size is around a B and those don't jiggle too much when you've got a bra on.
so really, boob physics when running would be kind of really unnecessary.