Heya Wallet!
Just going to be giving my opinion here; keep in mind that I am not a map judge.
The BUILD fits the theme well, however just as a personal opinion from myself, would be to colour the planets through the use of shading, try to incorporate other blocks into the palette you've used on the planets to do this.
The THEME of your map is unoriginal as we already have space/planets themed Manacube. When coming up with a theme I'd advise you to check over this document here:
Maps List - this shows all the accepted maps on ManaCube to date, with their themes to allow you to see if a theme is already on the server.
The PARKOUR is a lot better than your past maps, so you're really improving; however, the parkour is mainly floating, which is no longer accepted on ManaCube, try to incorporate your parkour around a 'main build'. Also, try to keep block variation consistent throughout and don't clump it together. I'd recommend you check this document here:
Jump Variation - this will allow you to grasp a better understanding of what I mean by jump/block variation. Another issue I found would be that the difficulty is fairly inconsistent throughout, so balancing that out and keeping the difficulty the same across the whole of the course would be something to look at. And that is all.
Other than that, I wish you all the best with your submission and future ones!
Best Regards.