I think the Batarang might look fine once combat animations (or something) give it some context.
The anatomy could use a bit of work. Batman's torso and arms appear to be another pair of legs, the thicknesses and lengths are so similar xP
You don't need the visible eye-holes, since there's no good way to position them at this size and Batman reads plenty well without.
Here's an edit with some tweaks to the anatomy, removed eyeholes, and a few other changes:
- I showed a bit of the cape at the bottom to make it look more like a cape. I removed its outline so that it doesn't clash with Batman himself. Capes are great for making characters read well on a variety of backgrounds, and it's not a huge problem if they blend in with the background a bit themselves.
- the anatomy tweaks opened up the chest, creating room for the Batman logo
- I widened the bat-ear a bit, so that it reads better and is less likely to get lost on a dark background.