Here is the full list of all 14 The Last Tinker: City of Colors achievements. It takes around 10-12 hours to unlock all of the achievements on Windows.
Punch a very special crate.
Reach the Tower Gallery.
Reach the highest point of the Great Windmill.
Defeat the Boss at Blue Harbor.
Solve the crime at Blue Creek.
Defeat the Final Boss.
Shoot the moon at Blue Harbor.
Find the hermit living in the turtle cave.
Colorize all the Purple paintings in Purple's dream world.
Send one of the Greens flying in the Market District.
Conduct the orchestra without making a mistake.
Buy every combat move in the Dojo.
Collect every Floaty Brush in the game.
Give your eyes a hard time.