I followed you so hopefully I'll get some notification :) With the timer I do think showing it not only when it's close to zero but during the whole time would be better. Not knowing how much time you have left gives an unnerving feeling which is not really necessary when you already have an countdown.
The timer only starts when you get the key and once you get it the icon appears on the UI. My fault I didn't come up with something intuitive to make it easier to get. I remade it a little to make it more visible (still going to do something more, maybe a red vignette pulsing?).
Would love to read your toghts and thank you for following! Means a lot :)