World Game Update v0.0.0.4

Another update to World Game!

• Added Ambient Occlusion.
• Added Chunks loaded count & Entities loaded count in the "F3" debug panel.
• Game will now pause automatically when player loses focus.
• Test Entity movement is now more random. [for testing purposes]
• Knockback to other entities like "Test Entity" will now be applied only when its iFrames is zero.
• Non-player entities (e.g. Test Entity) will now unload from distance 1 chunk closer to the player.
• [back-end] Removed a lot of unused code.
• [back-end] Began working on creating script for an inventory system.

[back-end] = Features not really added to the game, but is inside the game's code.

Please if you find any bugs, report it. Have Fun! :)