Needs Lots of Work
It's decent, but it needs a lot more. For one, you need to learn how to draw. Give the character some lighting, and maybe make him a bit more than a ball.
Second, the ground needs way more texture. Just create a Group over your current ground and make it artistic. You could draw lava over the red spots to make it look more cinematic, or maybe grass over the ground or something, or polish up the yellow sunbeams. That would have made tons of difference.
It seems like you might be using copy/paste tutorials... The engine at the beginning reminded me of FeindishDemon's tutorial, while the space levels reminded me of Ball Revamped, except that it had way better hitTest for the corners. I think you'd have used the same hitTest for the entire thing if you had written all the script yourself.
It needs way more levels for the different realms, like Neon and Space, and it also needed something like a Level Select you could go back to. The balance was whack.
One more note was that the inverted colors thing was stupid. You're just redoing the same level with different colors for no reason? Come on. You changed ONE of the levels for it, and that's it.
Lastly, the V-Cam was way too small, giving the player a bad view of the map. Just use the Free Transform tool to make it bigger.
Needs tons of work, most prominently in the graphics area. I used to draw graphics almost that bad, but the important thing is not to let a single color take up to much area of the screen. Even using Bevel filters is better than it.