New update with minor fixes and gameplay tweaking

After fixing the major bugs, I have been working on tweaking the gameplay to make it much better and easier to play.

Here is the list of what has been made :

• Fixed the aliens' AI who had sometime troubles getting on roofs.
  
• Fixed the bug where aliens were still growling after being killed.
  
• Fixed the high rate of footsteps sounds when running unarmed or with the baseball bat.
  
• Added stamina to the baseball bat to prevent infinite smashing.
  
• Lowered the damage range of the baseball bat.
  
• Added wood crates under spawned weapons to make them more distinguishables.
  
• Tweaked the waves so that the aliens will come from all sides of the map during the first 3 waves.
  
• Lowered the friendly damages inflicted by grenades.
  
• Added more in-game tips.
  

So this will be all for this update. The game has been updated and is now solid.

Have fun !