Update 1.0.3 - No cheats, except for the Practice mode

Changelog:

• Fixed a bug with immortality after entering and leaving the Practice mode.
• Fixed a bug that made it impossible to remove the sniper rifle and made copying the weapon possible.
• Player now has infinite ammo in the Practice mode.
• Fixed a bug with layers on some maps.
• Fixed a bug that caused the player to "eat" weapons when they were under the mouse cursor.
• Added information in Level Editor about placing the End object somewhere.
• Improved video playback (ex. during the loading screen and the "Log in" scene) and fixed a game crash at the start.
• Improved collider size for the barbed wire object.

~@TheMatiaz0