This was a very fun concept! I only played speedrun mode, but I really enjoyed what I saw. (although, it took me a while to figure out what the goal was)

Zipping around was very enjoyable once I got a hang of it, although I wish the grapple range were a little bit longer. 

I do have a few comments, however:

• When you go fully upside down, the horizontal mouse controls invert. This was really disorienting for me.
• Some of the models and textures feel really out of place. For instance, the hand and rock models are so much higher quality than the biodomes, vehicles, and other astronauts that it made the game visually look like an asset flip. Perhaps that wasn't what happened and the lower-quality models were just unfinished, but it still was visually dissonant to me.

Thanks a lot for creating! This is definitely one of my favorites so far.

(Also, I found the dog)