There is a lot to like here, but you really hit the right spot for me, when there was a equation with the lightspeed showing the five second time!
As for the rest? The audio part was great. The sound focuses you from the start, and keeps you till the end. Also- I always appreciate voice acting in jam games, so there's that :)
The graphics? The minimalist silhouettes work fine. It's how the camera work presents the plot, and how you use every second of the time limit, where your submission shines! I could easily see this as an intro to an x-com style game!
Great work!