v0.6

Start to drawing the first level.

Change layers/canvas names to 'entitites', 'interactive', 'ground', 'decor' and 'infos' (in order of superposition).

Add a hide function to be able to cancel glyphs superposition (between player element and decor canvas for exemple).

Begin to implement music in the game.

Start working on color schemes.

Change jump inertia to be smoother.