Here is the full list of all 9 Memory Maze achievements.
Complete your first maze
Score 50 points
Score 150 points
Score 500 points
Score 1000 points
Run your first kilometer through mazes
You run 5 kilometers. You are a sprinter
You run 20 kilometers. You are a marathonian !
Unlock all letters to form the SUPERNOVA word ! Voilà. All my congratulations