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