The right eye looks kind of funny being the only thing not animated. Perhaps you could benefit from a little subpixel animation. (And if you don't know it, learning it.)
The heart is also moving a little wildly.
I feel like you should have chosen a more unique shape for this, such as a cylinder or a cone, but oh well. And you didn't have to use a heart either.
It would be interesting to see a little collection of these.