Periodic Snake is a pure JavaScript game based on Snake, but there are some key differences:

• Movement is from left to right, in a wavelike manner
• Controls modify the snake's amplitude and wavelength
• The snake grows by absorbing same-colored circles, and it shrinks by colliding with spikes
• Energy is limited, so the snake has to eat every 20 seconds or face death

• Node.js
• Custom 8-bit sounds
• Snake movement and path projection are sine-wave based
• Custom transitions

• Difficulty levels: one spike collision either kills (HARD) or cuts the snake in half (EASY, current default difficulty)
• Score board
• Ripple graphics accompanying all motion
• Mouse controls