I love this!!
I like the fire engine, the houses, everything looks great :) I especially love that the fire engine handles better driving backward than forwards (IMHO) and dont ask me how I found that out :P
The music is good (especially the siren) but the leveling could be improved (the fire stage is much quieter than the rest of the game),.
I LOVE the start menu! Good job on that.
The difficulty is quite easy. I can normally get to the fire in less than a minute and that is with a few crashes. But the level is designed well with most routes taking a similar distance. The putting out of fires is also quite easy.. And the helicopter takes a long time (about three times as long as it would take to just put out the fires) and when it does come, it doesnt have a huge impact (that I have noticed, maybe I'm missing something).
I would love to see where you would take this game next. I would love to see people on the game (either that you can hit while driving) or that you can rescue from the burning house, ricking the fire to spread more.
But this is a good game. I enjoyed playing it!