Lives and versus
Every snake has 3 lives. After a crash you lose a heart and come back a moment later at length 4, keeping your score. You blink for 2 seconds after a respawn and can pass through snakes while blinking.
In versus, the first snake to lose all 3 hearts loses. When the 3-minute clock runs out, more hearts wins, then the higher score.
Hitting a rival's body costs you a heart. A head-on crash costs both. Eat again within 3.5 seconds to build a combo, up to x8. 2 Players: green uses WASD, the second snake uses ←↑↓→.