Thanks very much for your careful play and detailed feedback, these feedback would help me to a lot to polish the game! I have marked all of them down, they will be seriously taken into consideration.
The poor physics implementation causes lots of weird bugs, introducing unpleasant experience, which has been complained by many players. Only the Godot Physics Engine is used now, I didn't add too much code for the physics interaction. More efforts are definitely required on finding better physics paradigms.