I get a runtime error? :(

Hmmm... This feels like "gamification" of traveling salesman problem. It would be a lot more satisfactory if it had at the tourists walking between the cities, and have dollar signs popping out when they arrive.

The sound (inclusive) music is only on the headset's left side. I agree with vigrid: there should be more visual feedback and a deeper game mechanic.

The audio wouldn't work right for me at all. If I enable "Speaker fill" in my soundcard software, the audio comes through choppy as hell. If I disable it, the game is silent. I'm guessing this has to do with what Jeremias said.

As for the game, I really don't get it. There's way too little feedback in each part of the process for it to be fun. A town won't even update to show you've visited until you move the mouse away from it then back over it. I'm told to maximize money but am not told any of the parameters that determine how much I earn. I managed to get $437 (I think) but I have no idea how close that is to a "win." (Saying "Highscore" doesn't seem appropriate here, since, if I understand it, there's an undoubtedly best way to perform the task.

The visual style is very cool.