Merge pull request #25 from Fidouda/fidouda

Ajout du swipe motion
mainMenuBackground
mainMenu improve
Merge pull request #26 from mamio/master

mainMenuBackground
Found how to flip character
Merge branch 'master' into fidouda
We can die! + Much improvements in death screen
Ajout level2 + debut invincibilite + default txt
Collision behaviour added
Merge conflict resolved¸
Merge pull request #28 from benbonjour/master

Collisions more fun
Merge branch 'master' into fidouda
merge conflict resolved + spikes
Merge pull request #27 from mamio/master

We can die! + Much improvements in death screen
fu
Conflit resolved