Switches allow to reach certain levels.
In all, there are
7 switches.
They are before :
* level 1-5 : this switch is yellow
* Kevin's level 1 : this switch is pastel blue
* level 2-2 : this switch is green
* level 3-1 : this switch is blue
* level 5-2 : this switch is purple
* level 6-1 : this switch is pink
* level 6-2 : this switch is red