Here is the full list of all 9 Touch the Color achievements.
Play 100 games.
You bought a theme with stars.
Change theme for the first time.
Collect 1000 Stars from the beginning of the game.
Collect 500 Stars from the beginning of the game.
Play 10 games.
Collect 100 Stars from the beginning of the game.
First game!
You get your gift for the first time.