Your objective is to fill buses with passengers of the same color. There are varying numbers of passengers in various colors on each level.

You just have to tap on it to send the passenger to the bus. The passenger boards the bus if the passenger's color matches the bus's; if not, it waits in the empty tiles. In the case that the bus and passenger colors are different, make sure there are enough empty tiles. You are going to fail if there are no empty tiles.

You need to board all passengers in order to complete levels. As you complete levels, you will earn coins. Coins can be used for purchasing boosters, extra tiles and skins. Boosters help you solve more challenging levels by giving you special abilities.