There's something with the camera that does't feel right. Maybe changing it's transform property based on player position could be a good idea.
BTW, this game is so fun and looks polished. Well done :)
It is the isometric view that make seeing hole a bit more difficult. I would need to put the camera at 90 degree for the hole to always be clearly visible. The more the angle is close to that, the more it will feel better. I thought it would look bad, but it wasn't that bad. Isometric make thing look more beautiful, but it's less functional.
Thanks for feedback !