For a first game jam I'm really impressed with what you got here! The sun slowly cooking you adds a nice extra layer of difficulty.
I would say that the camera switching between different parts actually wasn't the most difficult part of the game for me. I would say that the most difficult aspect in this game is me dying because I stopped focusing on the health bar.
I think making the bar blink red and/or make a noise when you're low on health would definitely help with that!