Press on the ticket booth to let passengers on to the train

press space or enter to toggle interior/exterior view of the train 

Let the right amount of passengers on to the train to win!

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This is a little concept game I made for a game jam to improve my skills at development of educational games.  It is meant to allow players to explore concepts of multiplication and division through a fun scenario.  I would like to improve this game, as so far, it is very basic, so please leave me suggestions for improving the fun of the gameplay and the integration of educational mechanics!