The stone you mentioned is probably the “đầu sư tử”, am I right? If that’s case, near the top-left corner of the map, there is a room where you can get a “mảnh ghép thứ nhất” on a statue. After that, place the “đầu sư tử” stone on the statue.
If there’s anything you’re curious about the game, feel free to ask ;) I’m really happy that you’re managed to play the game and get this far XD
Oh ok.
The stone that you've collected is one of 4 stones that you have to collect in order to open a big door in the church. And the "dây cột" is actually a "dây cót" - a mainstring that you can use it in the clock that is in the save room. Use it and the clock will stop tickling and a "đầu sư tử" stone will drop.
ah yes, I almost forgot about that part :P. It's one of the more frustrating monster chase level compared to others. But you almost came close to the end of the game xD, I'm very impressed! That part was hard and challenging, but it's doable, you just have to push the crate as fast as you can, there are several ways to push it and eventually, you will find the fastest way xD!
