Adding answers + images

- Adding answer that fall from the "sky"
- Adding images to thoses ennemies with the custom game interface
Pushing pre-finale version

- Adding particles
- Adding mouse colision with ennemies
Correction on Move Module

It didn't work, so I corrected it. It was because it has to add the
method on an instance of object, and not the Class.
Merge with master version

- Merging conflit with master