A reasonably fun little game. The musical shift as the timer got close to its end was nice. I also appreciated there being volume slider - it would have been better if it was still available during the gameplay through a pause menu, but there's only so much you can do under sharp time constraints.
As for gameplay, it's simple and effective. The balancing felt particularly well-done; I didn't have a lot of leftover time at the end of a given level with what I thought was a reasonably good approach path.
I can only really think of two things I'd suggest for future development. One - more things you need to do as the game progresses. Maybe moving a bed/supplies into a "safe room" for bigger storms or something like that. And two - a level preview so that you can plan an approach before loading into the level, so that your first attempt isn't slowed down by the time taken to run around the building, take stock of where things are, and plan a route.