Help execute habbo Downloader

[Glock1533]

Hello, can anyone help me to run this program I found on the web I created the directories all right plus I did not understand the part of executing the command

$ cd Desktop/Downloader
$ /path/to/php run

habbo downloader link: https://github.com/higoka/habbo-downloader
sorry for my english i'm from brazil

[MentaL]