Here is the full list of all 24 Smile For Me achievements. It takes around 5-6 hours to unlock all of the achievements on Windows.
Find an alternative route
Dispose of the Duck
No thank you ma’am
Forgive and forget.
Satisfy every habitician
Leave unfinished business at the Habitat
Escape the Habitat
Some crimes can’t be forgiven.
Accept a smooch
Get a very high score at Whack-a-Molar
Find every diary page
Grip a Y’owl for Borbra
You really went and did it, huh?
Clean Kamal's teeth
Find the Duck’s true owner
Satisfy 15 habiticians
Unlock the Terrace
Discover a hidden sweetheart
The secret’s out...
Help a friend in need
Unlock the Lounge
Unlock the Carnival
Hit Ronbo with a golf ball
Satisfy a Habitician