Update Note 0819

1. Fixed the bug that caused the backpack page can't be closed.
2. Fixed the bug that cause character freeze after rolling.
3. Remade the pick-up system, you can now pick things up when the items are around.
4. You can now check for objectives by a press of M instead of holding it down.
5. Added hints in the 1st level.
6. Fixed bugs when aiming.
7. When you are defeated by the final boss, you can choose to continue and trigger the Vampire ending, or choose to fight the boss again.