got some spare time, try that game again
still awesome game.
I also try to do different things and here is a correct way to enable cheat menu in CD32 version:
0. go to Options
1. select Mode: Arcade
2. go to slider SFX Volume and set it to Minimum
3. select Exit
4. go to Hi-Scores
5. press and hold Blue button on pad
6. Press on pad (while still holding Blue):
Up, Down, Forward, Reverse, Yellow, Left, Right, Play
7. relese Blue, go to Options
8. enter new sub menu Configurations