It was hard to figure out how to play this game. If I understood correctly, the amount of food consumed depends on the number of passengers. On the first round, I didn't pick up those who only pay $10 for the fare. On the second round, I forgot to drop off the guy from Cyberpunk. Luckily, I had enough money to make one extra round, and I completed the game. It was quite interesting.
As for the downsides: the item dragging is not very convenient; they get stuck, and if you don't place them properly, the bus won't move at all without giving any errors. Also, the icons aren't very informative; it turns out that the red diamonds represent fuel, and the bottle of rum is actually food.