This is a clone of the classic Atari 2600 game Adventure. It has everything the original had (including the easter egg). There are 5 games total:

Game 1-3 are just like they are in the original Adventure game (complete with Easter Egg!)
Games 4 and 5 use a new map that I made. It features 5 castles (two of which can only be opened with a hidden master key, and one you can only get to by using the invisible dot to walk through walls), 2 bridges, 4 dragons, and non-symmetrical mazes and catacombs. Game 4 (like Game 2) always begins with objects in the same place. Game 5 randomly places objects. Both Games 4 and 5 have a special easter egg which will imprison the bat, kill all the dragons, and give you the chalice.

Additionally, any game can be customized in two ways:

New Objects - You can cause two new objects to be placed in the game. The Candle gives you more visibility in catacombs and the Shield keeps you from being killed by Dragons.
Difficulty - Unlike the difficulty switches on the Atari, this difficult will make the dragons move and attack faster, as well as turn all mazes into catacombs.