Here is the full list of all 18 Ayo: A Rain Tale achievements.
Walk through the village
Found the well
Defeat the giant red viper
Reach the skies
Defeat Ja
Walk through the harsh desert
Reach the village
Learn the gerbil ability
Learn the warthog ability
Learn the gazelle ability
Learn the owl ability
Drop a block in a breakable floor
Change color 50 times on a single level
Reach the sky without getting hurt by mosquitoes
Defeat the red viper without dying
Defeat Ja without dying
Clear the Sahelian desert without fainting
Get all the collectibles