Castle VI
Original title: Castlevania
Platform: Nintendo Entertainment System
Region: USA (Update Hacks)
Media: Cartridge
Controller: NES Gamepad
Genre: Platformer 
Gametype: Hack
Players: 1
Hacked by: ZCNE
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A hack of Castlevania I by ZCNE. The basic level structure and enemy locations remains the same, but the block placement and background remains is rearranged drastically. Characterized by some particularly nasty sudden death falling situations.

http://castlevania.wikia.com/wiki/Castle_VI