This game uses 3 action keys apart from directions. After lots of testing we decided to exclude classic joysticks that only have one button since it was quite unplayable.
Viewing post in Ninjakul 2: The Last Ninja (ZX Spectrum 128k) comments
The problem is that jump and UP cannot be in the same key since there are some screen that we cannot pass if they are the same key. So imagine using the joystick just for moving the player and 3 keys for actions... Anyway thanks for the comments, they are always welcome. This game was our first as team, it could has been improved for sure 🙂