Here are some screenshots from my most popular created level according to amount of players, # of attempts, and most likes given:
Mario Plays NES Games
Course ID: TW6-PMX-VQF
Description: As Mario, go home to your living room for an afternoon of playing three NES classic games on your NES. Turn the NES on and hop inside your TV to play a level of "Mario Bros.", "Donkey Kong Jr.", and "Super Mario Bros."