This is a really good proof of concept for this sort of game! Your pixel art is adorable without being distracting and everything fits in nicely. While generally I find 2D platformers are pretty common among game jams due to being some of the easiest games to make, I think this one takes a fun spin on that by adding the area mechanic that drains and adds health depending on your proximity to a lamp. That said, there is definitely some that could be worked on in terms of mechanics, as it feels a little sticky when she lands, a little floaty when she jumps and kind of hard to control when she flies. This game excels in its atmosphere, adherence to theme and general graphics all around. I would have liked to see the bossfight if you were able to make it, but pivoting to an endless mode is a clever way to ensure the game doesn't just end abruptly for the player. Still, maybe it would have been fun to be able to fly in the endless chamber too...
all in all, it's a solid game jam product. Good work!