I bought this game 10 or so years ago - I personally thought it was terrible. The main problem was that you don't actually move accross a level like in Mario Bros or Sonic or nearly every other platform game, but you move per screen. This means that if you walk to the border, a new screen will load.
There's no way to know what comes next and when you return to the previous screen, the monsters you killed are completely respawned. And respawning monsters is one of the pet hates :P There's more to the game that I bothered to discover, I must admit, but I guess it takes some effort to get into it.
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