Beta-8, reworks for everyone

Hi guys, in this new version we've changed lost of thing, for future updates. In the coming weeks, we're going to work on the rework for all levels, starting with Desert 1 & 2. We have also reworked the code of the keys and the doors, for better functionality.

CHANGELOG

-Internal rework to Desert 1 & 2 (mobs and hitboxes).
-Changed the main GUI, deleted the exit button and reorganized the other buttons.
-Changed the GUI buttons a bit.
-Rework to the doors and the keys code, no more bugs.
-Changed the texture to some flags in the settings menu.
-Changed the GUI of the message, when you pick up a key.
-Changed the GUI of the message, when you pick up a reel.
-Fixed some bugs:
+You cannot access to the Extra 2, even with the key.
+Fixed some bugs related to some sounds.
+Fixed some bug related to the hitbox of Jimmy.

-LOTS OF MADE-IN-CHECHU CHANGES!