I enjoyed this one quite a bit. The islands were detailed, especially given the time frame. The astro cam was a nice touch and I thought the jetpack was neat, though it did get me in trouble a couple times. 
I agree that a checkpoint at each level would be much more enjoyable in this  setting. I also thought the teleport was a bit unnecessary, but overall I loved the concept and if you worked on it I would be excited to check it out more. Great job!

This took me a good 5 minutes to figure out what I had to do. I think the biggest issue I had was fighting with the teleport locomotion. Definitely, not needed. This would work so well as a stationary experience seated or standing if you put the player right in the middle of all the floating asteroids and let them rearrange them. I would even go further and prevent the player from giving the fat astronaut any lift and just have a fun minigame with all the pieces and arranging them in a Rube Golberg machine type layout to get to the exit. As C-Through already mentioned the permadeath was killer for me and I couldn't figure out why I could move some of the platforms but not others. This has a lot of potential for a fun game!

Great idea, and nice execution! I really like the art for the little floating islands and a good choice of idle music. I know there's the rock to test your path. But, restarting the whole experience if you mess up is a bit steep.