fˌɜːðɚmˈoːɹ, sˌʌm lˈɛvəlz hæv sˈɛkʃənz ðæt ɹᵻkwˈaɪɚ wˈʌn ɔːɹ mˈoːɹ bˈuːsts tə pˈæs, mˌeɪkɪŋ ɪt nˌɪɹli ɪmpˈɑːsᵻbəl tə kəmplˈiːt ðə lˈɛvəl wɪðˈaʊt ˌɛni.
Furthermore, some levels have sections that require one or more boosts to pass, making it nearly impossible to complete the level without any.