I really just wanted to try.  Being very ambitious having never finished a project, and didn't finish this one, we have the incomplete cosmic prowl.  The aim of the game was going to be using a "window"/"cone" in front of the player character to see the "invisible" particles representing scent (or dark matter).  But also all mobs/NPC's would also use this at "long range" to track targets.  I was going to add an element of the Wolf (you) needing to find special items (bones?) to progress to the next level.  Obviously an attack mechanic for mobs to attack each other also.

boring I know.