I think I see what you were going for here, with some more work this puzzle could work well! I've been trying for 30 minutes but unfortunately, I couldn't figure out the solution to the puzzle. I tried counting objects that were similar in shape to the ones drawn on the hint. However, nothing was working. There were a few annoying bugs I encountered. First, the material for the walls has back-face culling enabled so you can see through the walls inside the room. The keypad was also a bit buggy when you re-entered, you had to purposely type in the wrong code to remove the "invalid". I'm not sure what your code is doing here but I suspect you are using a Coroutine to clear the text pad which is terminated when you deactivate the UI object. Anyhow, I think I see the vision. Good job!