High vs Lifetime Score
The High Score is the highest score you have earned while playing the game one time. In the below example, a high score of 10 was the the most points scored during a single training playing that game. Then when the game was played again, they were able to score 17 and updated their new high score to 17.
A Lifetime Score is the total score you've achieved since you first joined Nymbl with the selected game. In the example below, someone has scored 15 points total while playing the animal shapes 1 game. When they did the game again they scored 17 more points, moving their lifetime score to a new score of 32.