Actually you just get a metric ton of continues, they aren't infinite.
Well, there are at least 5 on all difficulties, i didn't count them (2 tries on easy: finished, 1 try on lunatic: ran out of continues on last stage 1 spellcard or so), but the fact that there is no continue counter and that i can finish it on both first and second try despite it being hard made me think that they are infinite, at least on easy. (Then again, i somehow finished SA easy on my first try ever. I don't remember if it was with or without continues though, either way i was probably lucky)