I like the main idea but i felt like you weren't forced enough to send a firefly due to the light ressoruce it already gave to the player, since i could basically walk through a big part of the level without using it, though i feel like the level length was a bit frustrating, maybe a checkpoint here and there would be nice to avoid that. I could also image the fireflies flying after a set cooldown and you have to decide where to shoot it to actually being forced to walk into death. Also maybe add a fullscreen button to the itch page.
Other than that i liked the theme of the game and i think it fits pretty well into the Jams Theme. Thank you for the game :)