I think this is the game in question:
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Write his name as "Harald Mueller" to Youtube search and you'll get lots of results.
This guy has surely made a lot of games in a short time between the years 1992 - 1995. And most seem to be clones of other games.
For example this game:
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Looks a lot like Dilemma:
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I noticed some gfx in his games have been ripped from commercial games as well, like Vital Light, Tearaway Thomas, Speedball 2 etc.