You can access this game mode by pressing the "Play" button that you will find on the main screen and then "Mountain Track". Once you do, a new pop-up window will open from which you can choose your opponent and start the game.
This board represents the default game mode and the rules are simple: get all six characters and reach the top before your opponent to win.
As you move forward, you will notice that there are certain squares marked with one of the six question categories' symbol, which represents a character square and are mandatory stops on the board. You will need to answer a question on the topic corresponding to the character you have found in order to continue moving forward.
If you fail to answer correctly, you will lose your turn and you will not be able to advance until you pass the character's question.
If you get all six characters and reach the goal before your opponent, you will be the winner.
Additionally, you will find purple squares with a question mark and, when falling into one of them, you will be able to choose between several specific topics to answer. If you answer correctly, a new themed mission will be unlocked that will allow you to obtain collectibles of the chosen topic.