I have tried the invisible spiral but haven't used it much so didn't know it was glitchy. But the other spirals work fine anywhere even with high spiral power? I saw he added Assnosis which is great. There were other people that wanted it too.
The amount of damage that a Girl's Shields can take in the higher levels of Countryside is staggering. The Overflow Errors cause their HP to loop through -21,474,850T (-21.47QT) to 21,474,850T. (21.47QT) This can loop multiple times. I'm currently in the Lv9200 range, and they loop at least eight times per Girl. Thankfully, the Overflow Errors aren't harming gameplay, it's just a visual bug. Of all the things that need improving, this is pretty low priority.