The puzzles are neat, though I don't know if the physics of a smaller block being able to push a bigger block against the wind but not the other way around are real. I was having fun kiting as many blocks as I could bring with me to furter levels (got to three extras, then I had to reset) and a bit annoyed I couldn't cheese any puzzles with them, but that's good game design. The player felt a bit slow especially since you sometimes needed to go all the way down a corridoor to see you need to lug a block there. You should also make the screen bigger, you can change this in the edit game page. Being fullscreen added a lot of information and made the puzzles easier. The music is very cool, I like the rollercoaster effect of the synth arpeggio. The art is really good, I like it a lot, but the astronaut feels kind of out of place. The invisible walls at the end also prevented me from going all the way to the 'thanks for playing' text. Also a bit wierd to be exploring a dead space station with fresh blood all over and come to the end to an upbeat space track with nothing more, but I totally understand you didn't have time to add a bossfight. Scope and story are always annoying to combine. Overall, it was a pleasant experience, and I really enjoyed it!