the spawn trigger for group 6 activates most of the necessary triggers for the setup.
the event links under player detect check whether the player is pushing any of the platformer mode buttons.
the spawn trigger for group 43 activates the dash sequence when it detects that the jump button for player 2 was pressed. it is activated by group 31 or group 44
the event links under refresh dash check whether the player should be able to dash again.
the event links for falling blocks activates force blocks which keep the player in the air while dashing.