Very nice entry, especially considering you only took 8 hours for creating it. I like the art style. The theme is taken literally, while the countdown also enhances the feeling of needed action. Sad story, but fits very well. Would love to see even more, like "What happened before". What confused me though: The dialogue at the very end...was it said by the crew member who died? Was it a promise the protagonist gave them? It was not very clear how to put this... The pacing of the scene and overall concept however was very good.
The audio itself fits very well, although some music would make it even better in my opinion. You sticked to the time limit and moving the screen for proofing it is rendered in real time worked for me.
Overall very nice entry.