Congratulations on beating this really hard game! I must give you some reward . . . how would you like to play again, starting at Level 5? It's simple: restart the game and on Level 1, click the colon right after the word "Level 1". You will play Level 5 again, with 21 mines, 21 seconds, and no cheating.
Perhaps the best reward are the secret tutorials within the HTML tutorial! Here's a secret revealed: On the title page, click the word "product" (first instance) in the copyright message. See what you get.