Changing Gameplay/ added lights

Hi !

Mechanic changes :

Had feedbacks that were questionning the overall use of the walls, as they limit the player capacity to avoid ennemies.

So, i decided to remove the Wall mechanic, the player will now spawn in a preset world with walls that i have made beforehand.

Nevertheless, i'm thinking of letting the player  create its own preset and play on it, so he can decide in advance where he wants to place any walls and play on its own creation, if he wants to play on it.

Lights : 

I started to add some lights and audio feedback, since the core gameplay is mainly done, it's time to increase the game feel !