I've made a new version with levels. In previous versions the play loop was simple: you play a shift and when the shift is over you need to have enough money to cover the shift expenses.

In the new version, there are three taxi posts. You choose in which you want to work, and pay the post fees in advance. The fees change between the taxi posts, and are: $5, $15, and $30.

When you take a shift at a more expensive post, it means that you are working in a more affluent area, and you can expect people to be willing to pay more.

In addition, the game pace is now faster: people walk faster, spawn more often, the taxi ride takes less time, and overall shifts are shorter. This makes the game develop faster.