Hello microgear,
I regret to inform you that your map is being rejected.
The theme is slightly unoriginal, as we already have quite a few maps relating to outer space; however, the Black Hole concept is unique, so good job on that!
The build is a bit plain in my opinion; it just looks like one giant sphere. I agree with Tasses that there would be more potential with a bigger build. I also recommend using more block varieties; maybe some darkened clay or some obsidian would be good.
The parkour has some variation, particularly on the inside. I would add more variation on the outside. The parkour is incorporated with the theme nicely, so good job on that! I felt that this map was too easy for the hard difficulty. I would consider buffing some jumps.
Thank you for submitting your map, I would love to see more submissions from you!
Have a nice day,
Krisitna