Here is the full list of all 15 Lemurzin achievements.
Complete all worlds
Collect 5 units of food on 14th level
Collect 77 of sweets on 10th level
Go through the second world
To lose a hundred times
Get past the first world
To collect 500 units of food
To score 25 units of food in the fourth level
Go through the first 3 levels
Pass the second level
To collect 200 units of food
To lose 10 times
Pass the first level
To collect 50 units of food
Run the first level