Tip: Based on what i saw so far, Chrome has some problems with this game. Players should avoid it till all these save deleting problems are solved. The browser is deleting saves without warning and i saw some people saying that the same saves were preserved on Firefox. I went to check it and found that mine got saved too (without even playing the game on Firefox before!)
@TheSuperTrouper: I agree with all the comments about fuel costs being unbalanced and stuff, but i can't cope with the time-based gameplay... I've played a couple games that were pretty much like that. They were good in their own ways, a completely different style of playing. Taht's why the "Time Management" tag i guess
Instead of something new, a fusion of various good aspects of other TDs. Not many risk to do that, i'd say. And you made it brilliantly! Now, a suggestion: Although not being extremely necessary, some sort of priority choosing button would be of some tactical value, imho.