Really really nice, especially for the short amount of time I'm highly impressed by how you managed to get these visuals to work! I feel like the unlit parts could be a little darker still, and the movement of the character feels a little off, like it has acceleration or something that feels weird? But very solid game that could easily be made into a full game!

Very nice use of the Jam theme into the mechanic, maybe its a bit hard, would be better difficulty over time

I like the concept and it looks visually good. But the spikes are too light! Also, try to add difficulty over time, make starting the game easier and how farther you get how harder the game becomes.

I like it, and it looks very nice, though I would make the darkness darker, since the spikes are fairly visible even without the light

Nice idea.
I feel like all it needs is some powerups, and of course a high score system, and it would be a fun mobile game for example.

fun idea, i would suggest changing the controls of the character to wasd as arrow keys + mouse control is a bit awkward.

First of all, I love this. Such a classic concept and you just made it so much more interesting.
I feel like the origin of the light cone could be a bit higher tho, so part of the player is visible as well. Right now I mostly die because I hit the side of a spike, because I feel like I'm already past it.
You could also add some items, that give you advantages like a bigger cone, or disadvantages like a blinking cone.

Overall a great game, it fits the concept very well.