October 5 Optimization Update

Fixed the issue where the flamethrower would get stuck.
Resolved the problem of zombies passing through walls in the school tower defense.
Fixed some bugs on various maps.
Added numeric displays to the backpack interface.
Included values for equipped items.
Fixed the bug that allowed money duplication in the shop.
Addressed the issue of large numbers of zombies remaining after the school tower defense.
Modified the map's UI.
Changed the skateboard design for better direction recognition.
Altered the route for the "Rescue Friends" mission from the prison to the main city police station.
Optimized the route for rescuing students from the neighboring school.
Shortened the route to the Red Shirt Building in the mission.
Shortened the route to the warden's home.