A beautiful game with good atmosphere. The sound effects were satisfying and I feel like I should know what plays in the background but can't remember.
SPOILER ALERT FOR THE GAME:
When I first saw the concept I thought to myself smugly, "I'll just slow down at the highest point and then speed up at the lowest." Except it loops, so that's not possible. I was banging my head against the wall for 15 minutes, because I focused on changing the orbit instead of exploiting that I can retain speed through the loop without the orbit changing. I felt like I was just sitting in a tin can and there was nothing I could do. But the solution pays off.
I wonder if they'll believe Major Tom when he returns home. Reminds me of Final Countdown movie (a similarly funky situation occurs).
One note (not sure how you could get around this): the constant turning made me pretty dizzy. But so far this is my favorite entry.