しっぽが一部貫通してしまって申し訳ない。これでも可能な限り物理演算の修正をしたのですが、修正が出来ない箇所がいくつかありましてorz

There is a point where the tail is partially penetrated. I'm sorry. Even with this, I corrected the physics calculation as much as possible, but there were some places that could not be corrected.