Here is the full list of all 17 SnakEscape achievements.
Complete first level in Spring Pack with 99 moves and 3 stars.
Collect 3 stars on each level.
Complete all levels with two snakes by 3 stars.
Complete "Bresenham's circle" level with 3 stars after 10 deaths.
Get slipped on the glider and be eaten by snake 5 times.
Complete the level in 20 or more minutes.
Get slipped on the glider and fly off the level.
Get on the spikes 10 times.
Use the glider more than 5 times in one level.
Complete the level by blocking the snake.
Find the hidden treasure and an exit.
Leave 10 spikes before they will be open.
Meet the Gingerbald.
Complete summer levels with 3 stars.
Allow the snake to eat 10 stars.
Complete the level with 3 stars in less than 15 seconds.
Complete the level with 3 stars on the first try.