Yuji Naka on Facebook:
I received SEGA 3D Fukkoku Archives Maniax. When I read this, I know that they had quite a hard time in porting Sonic and Sonic 2. I thought whether it would be done easily with emulator. Making 2D to 3D is tough after all, isn’t it? When reading this book, I recall various nostalgic matters.
For putting Spin Dash to Sonic 1 in Sonic Jam, it was tougher to find VRAM storage than program, though. In creating the screen for 2P use in Sonic 2, I utilized Genesis’s feature that nobody was using, but I thought that it was the first time for that matter to be known probably.