Hi, a Twitcher had problems playing Snatcher: on the keypad the umbers 2, 4, 6 and 8 (which are also directional keys) didn't work when fighting, using openMSX 16.0. But for me this works fine. So, perhaps it's some Windows thing?
Can you please try this for me?
E.g. run with a turboR and press the numeric keypad of your PC and see which numbers appear (or not). You can also try in Snatcher of course 
I can provide an openMSX savestate if you want.
