When it hits a wall, it measures the angle of the surface and bounces back. However, if it hits the edge of the surface, it will cause a bug. ＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿＿ 壁に当たると面の角度を測って跳ね返ります。 面の端に当たるとバグります。
https://scratch.mit.edu/projects/1116277557
