How To Trick the Player 2: The Iterative Cycle
A continuation of the video "How To Trick the Player" that shows why you need to playtest and iterate on your game levels.
In How To Trick the Player, I made a puzzle that used the player's desire for efficiency and instant gratification to trick the player so they would fail to complete the puzzle. However, in doing so, I left the door open to trick me! They could follow a much different path and, following that path, they could complete the puzzle quite easily!