Here is the full list of all 10 Snail Racer EXTREME achievements. It takes around 0-1 hour to unlock all of the achievements.
travel 100 meters
get 20000 points
get 15000 points
get 10000 points
get 5000 points
get 2500 points
eat your first lettuce
get 500 points
start your first snail race
launch the game succesfully