I learned something I didn't know. The DOS VGA version has an extra minigame. Quoting mobygames: "According to programmer Peter Oliphant, the DOS VGA version has an extra game which is not present in the Amiga lead version. This came about because there was no design document and so he just had to work from the things the programmer of the Amiga version had already finished. At some point, he got ahead and had to wait until more of the Amiga version materialized - and so he developed an extra mini game in that spare time. "
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