I was on my last life, half a heart left when I entered a new sceen via elevator at the spot marked "O" on this map: https://www.nesmaps.com/maps/Zelda2/Zelda2Level07.html
It's the bottom of the elevator with the two ropes waiting in ambush. Well, one of the ropes got me as I came down. Game over. So I continue from that point. That game starts me off at that screen, but now Link is stuck in the upper left section of the wall with no way down. I had to reload my last save to try it again from the beginning of the temple.
This and the other I mentioned about the irregularity in the number of lives after a game over were the only issues I found. Again, very well done. I had a lot of fun playing this.