I have no knowledge of making this kind of icons, but i have a suggestion that would make them even more appealing to me:
You now have for the "moving" icons, 2 states the outer circle parts can have (hmm seems i am not so good in this design talk

hope you understand). My guess is that the intention was to make them seem to rotate, but to me it looks now like they are just blinking. Maybe make it a 3 state, so they would seem to rotate.
Lol i really hope you understand what i mean.
Hmm maybe example:
- | - | - (this looks like just horizontal and vertical blinking in turn)
- \ | / - \ | / - (this looks like rotating)