Demo Update Ver.0.5.2

[h2]Change[/h2]

• Changed the enemy’s vitality to 2 bodily attacks
  
• Changed gas station poster
  

[h2]Fixed[/h2]

• Null references may be made in the object pool
  
• Demo stage: wall run can cross the rock in front of the goal
  
• Building ground may be lacked
  
• Building wall collision gets stuck and bounces