I love how you used your theme to make a home for the bacteria that they need to leave.  Just a couple of changes like not using the escape button to get out of the lock in the first room if it is on webgl, and fixing the music to constantly play instead of restarting every time you move.  Look into this for the music: https://docs.unity3d.com/ScriptReference/Object.DontDestroyOnLoad.html?_ga=2.79084052.1250397364.1592327427-1746761473.1588391442 

A pretty fun Escape the room style game.  I like how its pretty intuitive what items go with what. I just wish that items you could interact would have an outline or something so you know that you can click on it. Good Job!