Ecco the Dolphin (ZZT)

Ecco the Dolphin is a ZZT world by Oof, designed to play like the Sega Genesis game of the same name. Through clever use of objects, the game is capable of supporting eight-way rotational movement, the ability to jump out of the water and over obstacles, and to attack enemies by charging at them.

I made a full map of the game which can be viewed here. Each gameplay board includes an extra bit of status bar area which I have stripped out.