While we wanted to have minimal UI in Grapple, one of our exceptions was an indicator telling players where the power generators were.  These icons appear when players pick up a power lantern.  They point towards the generators (where the players have to return the power lantern).

There are two icons with the same design.  There is a smaller one that usually hangs around the edges of the screen, and there is a bigger one that is displayed in the environment.  The smaller icons are used to point the players toward generators when the generators themselves are occluded by walls, buildings, etc.  The larger icons float and bounce above the generators within the world as if to say, “HEY, PLAYER!  COME OVER HEEEEEEEEEEEERE!!!”