PCB Stage 2 Theme: The Fantastic Legend of Tohno (Re-Extended)

This is the Stage 2 theme from Touhou 7: Perfect Cherry Blossom Apparently, humans who wander too close to the barrier are spirited away to Gensokyo, and find themselves in Mayohiga, where they can either return home or settle down. I thought it was supposed to be super hard to get through the barrier?