@voljega
when you use L2 on your joystick, a menu called "Neko Project II kai" appears with a pointer, but mouse's emulation don't works....
[EDIT] Mouse emulation is available in retroarch menu => Options / Joypad to Mouse Mapping "ON".
When you want to change disk image, you can use FDD1 or FDD2 menu (inside FDD):
text alternatif
But the open file menu can see only /recalbox/share/bios/np2kai folder
If you have a better solution... Put it in this forum