There was a signboard giving the welcome to Sonic, in which it is thought to say: ' You Are Welcome Sega, Sonic', with a picture of a palm tree in the top right hand corner. Green Hill Zone was initially different the sky was darker than in the actual Zone, the conical mountains were normal mountains (they appear to be close in the background unlike the final version of Green Hill Zone) with few small waterfalls and no river to be found, and the clouds are bigger. Of note is that in the interview, Naka claims that this tech demo was planned at one stage to be included in Sonic Mega Collection, but was never in any build as the ROM has since been lost internally at Sega. In a retrospective interview with Yuji Naka, it was revealed that the original Sonic Team put together a small, playable technical demo for the show featuring Sonic in an early version of the Green Hill Zone. The first glimpse of Sonic the Hedgehog in video game form was at the Tokyo Toy Show in June 1990, which also happened to be the first time the game could be played by the general public.
