Your game is just too pretty to be scary!
Obviously, if you go for disgusting you need an organic feeling, and that isn't going to happen with those highly stylized designs. You can't have them be so featureless.
Same with scariness, the symmetry gives a sense of balance, and fear is about, among other things, not knowing how the dangerous creepy thing is going to act or move towards you.
But maybe both of these suggestions are at odds with your chosen artstyle?
tl;dr: Symmetric and featureless does not equal gross or scary

Anyway, your second try is definitely better in the creepy department.