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