Fix texture light Pack a Punch

Change Level Design
- Remove purchase door front pack a punch
- Change position juggernaut
- Change position Shield
- Change position Weapons
- Change level design circulation player & zombie
- Add details


Change Game Design
- Add zombie : climb and jump down
- Add Timer
- Increase maximum zombie ( 34 )
- Infinite wave ( zombie spawn endless )

Technical
- Optimisation Lighting ( culling distance )
- Change water shader distance for better performance

Change dificulty :
Reduce health zombie
Reduce speed zombie
Increase health player
Reduce price power up : doubletap / sleight_of_hand