This game was originally written for an amateur game programming contest at Gamedev.net. Happyland Adventures won the contest, and it also got an award for 'Best use of SpriteLib'.
When playing level one, you'll hear Johann Pachelbel's Canon as part of the music. Pachelbel's Canon is a famous piece of classical music, often heard in movies, TV shows and in Holiday music compilations.
Information also contributed by jlebel