The game originally didn't feature ANY graphics on the Sega Saturn. When it was released on the Dreamcast it featured two play modes, visual and classic.
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The game is quite attractive for collectors due to its extreme curiosity and the fact that it includes some very stranges attributes like braille-cards, a bag with seeds (to plant!) and an extra transparant box with cloud motive. You might be able to still buy copies on online auction websites like eBay.