I like the idea, but i think there is some room for improvement. I really struggled with the controls. I think controls should feel easy and flawless.

Things i would improve:

• Not use x and arrow down. I would use the mouse and click which dashes into wall and bounce to the reflected angle. Thats easy to execute, but still challenging because you have to predict the angle.
• I you would focus more on the orbiting. What i would do is increase the orbiting objects and make your game build up speed only by orbiting (Not by walking). So the orbit becomes  more important mechanic of your game.

Keep going hope my Feedback helps you :D!

The game is very good but it is too difficult and long for me. I haven't been this frustrated with a game in a long time. Unfortunately, I couldn't finish the game. I tried about 25 minutes but I gave up at the end. Building speed with jumping is very good but it needs some time for getting used to it. And gravitating around black holes caused me to lose momentum a couple of times. It is a little bit hard to control the player when you are in the orbit of black hole. Overall, it is a good game. It just needs some difficulity and movement adjustments in my opinion. Good work!

Went back and made a good effort, but I got stuck (get it?) at this part and that was the breaking point for me. I think it's really good, but really hard, damn!

Dude! Killer looks but that first bounce is just way too tight. Could only get past it once, then I died immediately after.

Looks good though and I like the jump momentum gain, maybe if there were easier jumps before that one to warm the player up?