ɔnðə bˌiːbˌiːsˈiː mˈaɪkɹoʊ vˈɜːʒən, ɪɾ ˌɔːɾəmˈæɾɪkli dɪtˈɛkts sˈaɪdweɪz ˌɑːɹɹˌeɪˈɛm ɛkspˈænʃən ɪf pɹˈɛzənt, wˌɪtʃ ɐlˈaʊz mˈoːɹ diːtˈeɪld ɡɹˈæfɪks ɔnðə lˈɛvəlz, wɪðˌaʊt ˌɛni tʃˈeɪndʒᵻz tə ðɪ ˌʌndɚlˈaɪɪŋ ɡˈeɪmpleɪ.
On the BBC Micro version, it automatically detects sideways RAM expansion if present, which allows more detailed graphics on the levels, without any changes to the underlying gameplay.