A couple hours ago I finished running through Nelson Tethers: Puzzle Agent. For some reason I wasn't expecting it to be as short as it was, but this could be because it ends sort of abruptly. Just about everything about the game was good, but I would've liked for there to be more optional side puzzles. Throughout the game I think I encountered maybe 5 or so puzzles.  
 
I wonder if they're going to keep going with the story or have a new, unrelated case in each game.