I enjoyed the controls floating around in space, very well done! I only found 2 keys though, I wasn't sure if I was going back and forth in the same areas or not. It would be nice if the grappling hook grabbed onto everything!
Only specific enemies drop keys and they are spread sparsely throughout the station. I did plan on making the grapple work on pickups as well as enemies but I ran out of time. Thanks for playing.