I liked the idea- saving people under pressure of time was also my idea for this jam. The game is fast paced, so I was concerned if the firetruck handling wasn't too "floaty" in the end this wasn't the problem.
The graphics and sound were ok, but they could use a bit of polish. I understood what was happening at all times, and the severity of the fire was communicated in effective manner (both by the size of the icon, and the fire animation). Then again- some more details would add more character to the game.
I had some issues with the difficulty. I couldn't make it past level 2. My best score was 21/40 people saved. The two towns were too far apart, and buildings burned while I was traveling between them. Chances are I was doing something wrong here :)
As for the use of the theme- I understood it in a very similar way, so I guess it's great by my standards :)