@Laique,
Right.
Need is an app which recognises and differentiates needs and wants. If you can turn a want into a need you get two points, but if that need leads to multiple wants you then have to convert at least two of those wants before progressing to the next level.
On level 2, one comes face to face with desires, which are like wants but verging on a need.
To progress to level 3, one must avoid turning desires into a need more than three times, otherwise that desire becomes an obsession.
Obsessions score minus 3, so they are worth avoiding.
Level 4 deals with the need, desire and obsession with clicking your front door closed five times before leaving the house.