Improved version, so it means there was an older version that was worse than this? O_O
Sillyness apart, this hack is really boring. Its levels are the definition of linearity: ground enemies, a straight row of ground and a few pits to avoid. This, for all the 6 exits of the game. Plus, the level themselves are based on the originals. The last castle is a bright example, since the second room has slow autoscroll like the original Iggy's castle.