Update 0.4

The update 0.4 bring minor changes to the level design and an important bugfix !

Bug:

• Fixed bug that was deleting save file when unlocking achievements

Gameplay:

• Time for "pixel" jump with spring platform increased: 0.06s -> 0.1s
• Increased the egg difficulty on a couple of levels

UI:

• New art for the main menu.
• Changed the appearence of the buttons.