I'd watch it again
It's worthy of being a mainstream children's cartoon. Voice acting is phenomenal, The characters sound like they're actually into the script. Music is also terrific as it really fits the space theme.
What's somewhat problematic is the graphics. The art in here is really generic. The strange body shapes & simple gradients look like they came out of a cartoon - but it's all consistent so that's not necessarily a bad thing.
The storyline/script is okay, kind of predictable but not familiar enough to be boring.
As someone else said earlier, this looks very professional. You've got such a good starting point here. I'm sure this series will have a lot of fans.