Here is the full list of all 11 Pivross achievements.
Finish a puzzle, tutorials not included
Finish a puzzle under time and without losing an apple, tutorials not included
Finish twenty puzzles, tutorials not included
Finish twenty puzzles under time and without losing an apple, tutorials not included
Finish all puzzles
All Gold, All Gold, tastes real good!
Why is this even a thing?
Finish fifty puzzles, tutorials not included
Finish fifty puzzles under time and without losing an apple, tutorials not included
Finish seventy five puzzles, tutorials not included
Finish seventy five puzzles under time and without losing an apple, tutorials not included