I am the one who did something wrong! I forgot to mention the lights to be on if you want to use the key and get out of here.
Just added the info in the description but I definitely should have added a prompt when you get there to tell you either "Needs a key" or "Lights must be on" or both depending on the case...
Thank you for playing my game, I had fun trying yours, and huge respect for making a 3D game!