No worries.
Ahh all that makes a lot more sense, caught by the gotchas of a gamejam time frame etc. Well you mention trying it again so hopefully you get to improve the voice and/or subtitle resolution availability if you do go through with that.
Yeah I agree, the lighting gave it a great atmosphere, if you could improve the readability while keeping the lighting that would be ideal. It emitting light is definitely another good way to signify its importance without needing to connect it to the idea/color of a key. If you could possibly have the glow and the color light besides the locked doors match, to indicate what door is unlocked with it that could be even better.
Looks like you were already able to learn a lot from the experience making this, so best of luck giving it another go if you do.