"Its Life" is a list of comparisons for life, and most of them are bumpy. Life is a roller coaster where everyone's throwing up, a candy lost under the couch, a friend who walks away when you fall, and a chair with one short leg. Each image is a small letdown, something that promised fun or comfort and didn't quite deliver. The joke about life being "dark soul" fits too: it's a video game known for being punishing.
But the poem doesn't stay gloomy. The sweet candy and the soft banjo melody are gentle, even charming, and the speaker's tone is wry rather than bitter. The ending is the real turn. Even with everything wrong, life is "still" a roller coaster, still a candy, still a friend, and now the chair is "a chair to rest on," with no wobble mentioned. The speaker seems to accept life's flaws and still find some good in it. The mood is humorous, a little tired, and quietly hopeful.