w,s to move forward and backward. a,d to rotate left and right. q,e to roll left and right. up and down arrows to rotate up and down.
click on the canvas to add a new marker while the 'add marker' button is active.
click on any marker when the 'select marker' button is active. (they should change to red when clicked)
after markers have been selected, press the 'create path' button to connect the markers.
the 'ride path' button will move the camera along the created path. note that currently there is a 5 second duration for each created path.