Copy a Json from another game , rename the JSON to the same as your folder name for shinobi and open the JSON up and rename the game name with the folder name you used for shinobi.
Just a quick message to say thank you for your Sys16 emu, back in the day it was my first emu i saw at a friends house, it had no sound then, but it soon came together to be a great emulator, and it spawned many others i would think.. Cheers.
i enjoyed playing this on the Amiga Mini, i have noticed as someone has said that the steering does flick the opposite way instead of going straight after a turn.