It's a similar feeling, with Voyager (and other apps) picking up Apollo and trying to keep it flying.
The word Voyager makes me think of the Daft Punk piece, there's a bit in the video with an anime style star, this could make for a simpler icon theme: https://youtube.com/watch?v=CqZgd6-xQl8&t=2m29s
I think the name "Rocket" would be a cool name for an Apollo inspired app - simple and effective.
The rocket idea could be anthropomorphised (smiley cyclops) and become a character in an of itself; there was an astronaut with Apollo, there could be a rocket character with Voyager.
Orange and Blue is a popular contrasting colour scheme though.
I like the rainbow focus in the brief and I hope to see some cool creations. I'm not precious about the rocket idea, but I hope it inspires some more creative submissions, I definitely think something other than a slight variation on the lemming motif would set this app apart from the rest.
Weirdly, I hadn't noticed a lot of rockets testing on iOS... most of those seem to have the lemming, but apparently there are a few on Android with a rocket.
I agree with you and I'm not precious at all, I was hoping to inspire more creativity and uniqueness. I'd love to see/hear your ideas!