You can easily find your own score by klicking on "Friends".
In the past there were seasonal highscores, for example "Christmas Level".
There is also the highscore named "Total collected Crafting Lore". You have to click on "All-Time" to see the scores. However, if you click on "Today" it will probably say that a player's score is 2,000,000. That does not mean that the player has collected 2,000,000 Crafting Lore in one day. It means that the player has played the game the last day and has collected 1 or more Crafting Lore. His new total amount of Crafting Lore is 2,000,000.