Yup, It's a range of emotion. Totally depressed to sorta unhappy to blank to slightly amused to completely overjoyed. If you connect with their emotion you can make yourself more happy by going from left to right.
P.S.: I want to support a really good friend (I think shes very good) It would be so awesome of you if you could switch over her gallery [link] and maybe watch her and give her a comments or faves… only if you want and if you like the pics! That would be soooooooo nice I love her so much Thank you very much <3