DEMO 0.4.0 Update Description

This update is to test some new features and optimizations that have not yet been released to the official version
1. Add a new game mode, go to the main menu ->Extended Content ->Challenge Map, provide a defensive map, and unlock it after completing the DEMO.
2. Added assault rifle, available in the challenge map.
3. Add a new monster.
4. Fix that drool monsters sometimes can't spray anything.
5. Optimize movement, now the camera is no longer locked while running.
6. Optimize the form of the first monster in the beginner tutorial.
7. When picking up each item for the first time, the picking box will open, and then it will become a quick pick without popping up the interface.
8. Fixed some multilingual errors.
9. Optimized the initial clothing.
10. Fixed the issue of conflicts between the menu interface and the death interface after death.
11. Some minor adjustments to the map.
12. Fixed the issue of sniper rifle opening and reloading.
13. Added some small changes to the monster.
14. Some dynamic switching effects have been added to the main menu.
15. Other minor modifications.