Added patch, to change the duration of oxygen underwater, also updated the screenshots, the update was still showing images that no longer represent the current state of the hack.
On the other hand, the changes in the ROM information had not been reflected either.
This is a map edit for the original Metroid. Screens, enemy and item placement, palettes, text, and more are all changed. The primary goal was to make the game more playable - the discerning player will note the careful placement of platforms and enemies to make jumps easier. However, beating the game will not be a cinch. Items are much more difficult to get, corridors are contorted into winding mazes, and many of the energy tanks have been completely eliminated.