you're probably using a TOS version that set the refresh mode to 60 Hz instead of 50 Hz (US TOS for example).
Could you try with a french tos for example ?
Yes, I was using US versions of TOS. When I tried the French TOS 1.0 version, the problem went away. I mean the game still stinks
, but it was playable. I have to say I got a good laugh at the game moving at 10x the normal speed. I have not had that problem before. I kept the French version of TOS 1.0 around in case this happens again to me. I previously kept a UK version of 2.06 but, even when I owned a real ST back in the day, I found that the older games really preferred TOS 1.0 or TOS 1.04 at most.