Because so many people already own it.

U will find the most unlucky 3323 people in here xD

Why do you vote NO to SNAKE? Are you crazy?

Español:
Podés programarlo vos mismo, en un sitio llamado Minidosis enseñan a hacer uno idéntico en... 4 videos de 10 minutos, lol.
Es el juego más perezoso que intentaron colar por Greenlight. Me pregunto si al menos sabrán añadir algo diferente, como paredes, portales, objetos móviles... o simplemente hicieron su tarea y pretendieron venderla.

English:
You can program it yourself, in a website called Minidosis (spanish site) they teach you how to make exactly the same game in... 4 videos of 10 minutes, lol.
It's the laziest game that someone tried to pass Greenlight. I guess if they at least know how to add something different, like walls, portals, moving objects... or they just made the homework and tried to sell it.