One of the things I enjoy most in playtesting jam games is seeing when a very simple and basic core concept (such as "your mouse cursor is your light") is tested and explored to see what layers of depth could be added to that idea. In this case, the little plantlike lanterns that capture your light, while annoying, were a good way to layer some additional challenge on there, and the zoom-out was a nice idea too (I just wish I had a sense for the zoom-out cooldown).
Also, the sense of atmosphere is great. I wish there was some explanation at the end of what is happening, but I can respect leaving that open to interpretation. Nicely done!