Thanks for playing! :)
As for the death-by-stabbing-another-snake thing, the bigger snakes would automatically kill you (not sure why I thought it was a good idea, maybe at the time I thought the game was too easy... but I guess making that change increased the difficulty too much and made it a little more confusing than it had to be...)
Binding to number keys sounds like a great idea! I'll try to implement that in a post-jam version if ever I get around to making one.
(Also the enemy snakes took me a lot of time to tune, so I'm really glad that it felt like it was actually multiplayer! Thanks! :D )