Cosmo Run

From the main screen, click on the cog icon on the right to go to settings, then scroll down and click the About option. This will play the credits, which are only about 10 names. You can swipe/scroll down to pass them quicker. After the credits a mini game will come up. The goal here is to score 1000 points in this game. You score points by matching colors that are touching, and it needs to be at least 2 of the same color to match (as opposed to other match-three games), so this game is very easy. The best way to get a high score is to build up a lot of the same color in the grid and clear a large amount all at once. Keep playing, and you'll certainly get this. My high score is over 6000 because the game keeps going until you're out of moves, so it may take some time to actually lose and end the game than to get to 1000 points.

The achievement will unlock upon reaching 1000 points, and then you'll also get a bonus of 250 stars.