Is there currently no more story past defeating Mushria? I have defeated Mushria, Cynthia, Momo, Linnea, Mushna, and Wuelie, and now there is nowhere left to go. The sparkly doorway past Cynthia doesn't actually work and the giant mushroom girl blocking the one doorway underground won't move even though I've defeated both mushroom villagers.
[SPOILERS]
Either go past the caterpillar girl's shop to the right and defeat the mushroom girl then keep going right and jump down into the canyon, or jump down the very first canyon by where you first meet the fox girl, being careful not to land on the spikes at the bottom, then keep going down until you're at the bottom where the flying mushrooms are. Both paths lead to the same spot. Once you're at the bottom, head to the right and you should find the giant mushroom girl.