When you start the game, you will automatically play the starting level, Bedrock. After completing it, you will find yourself on the world map. From here you can move freely to reach other levels or basketball games, using the directional buttons.
The levels are reported in the order in which it is probably most convenient to face them, but it is not strictly necessary to follow this order, since you will be free to move around the world map. However, before you can go through a level on the map, you have to complete it. Once a level has been completed, it will be marked with a footprint. Furthermore, it is advisable to face the lake level, to reach the oriental village, only after completing all those previously listed. In fact, if you complete the oriental village with some missing pieces of the time machine, to get them and return to the previous levels you will be forced to cross the lake again, backwards. So it’s best to leave this level for last. You will then automatically access the final level, the one in the future, after finding all the pieces of the time machine. Finally, it is advisable to face the basketball games as soon as they are reachable, in order to acquire the special skills as soon as possible.