In March 2019, The Dizzy Fansite received a private message from a fan called David Rogers who discovered a Sega Mega Drive/Genesis ROM which appears to be prototype of Fantastic Dizzy.
He discovered the ROM on the server of the 'English Amiga Board' in a collection of other Sega ROMs.
You can download it here. (Requires a Sega Mega Drive Emulator to run) - DOWNLOAD PROTOTYPE
Further details aswell such as more screenshots and descriptions can be read on the Community Forums. - The thread talking about the prototype Again, there is lot more differences than what's been mentioned here. Feel free to explore the prototype.