Differences between the 1992 prototype and the final 1996 version:
- The Prototype has a very different soundtrack, which creates a different atmosphere when playing the game (Prototype has guitar music, Final release has folk songs, such as Barnacle Bill).
- In the Prototype version there is a digital scoreboard that was not there in the final version.
- In the final release, there are no special blocks and helps.
- In the final release, when only one player plays, the playing area is centered in the screen.
- In the final release, when there is only one player playing the game, the screen has only one playing field.
- The final release is an endurance game, while the Prototype is ala Tetris from Atari, a levels game.