MagiDuck

MagiDuck is an interesting platforming game starring, yes, a magical duck. It uses a special tweaked CGA mode (40x25 text mode) so it's actually using text characters for its graphics. Despite the limitations and inherent blockiness, the game is colorful and has a unique, fun look. The story is not too important, but the gameplay is the focus and it's smooth as you jump and shoot your way through the levels. The game also features a detailed in-game help system which explains the controls and provides information about the various enemies and objects that you will encounter.