Edit: played for a while, it's pretty fun. However sometimes you die just because another player spawns right in front of you which is pretty frustrating as there is nothing you can do. I would suggest adding some blinking dot that will warn a new player is about to spawn at some location.

Armagetron was roughly contemporary with GLTron, but has a zoomed out perspective that doesn't capture the claustrophobic feeling of not knowing what's on the other side of that trail you're next to. There are also games based on the lightcycle sequences from the newer TRON movies. I have nothing against them, but they're not the same thing.

Seems like an underserved audience might possibly exist for this sort of thing.

Nice project!