The game has three difficulty levels, easy, medium and hard. All three difficulties have 39 unlockable achievements each. 39 x 3 = 117 which is the total amount of achievements in the game.

All that is required to unlock an achievement is to spell out one word and let the next one fall, deliberately losing the session. So, technically the fastest way to complete the game would be to start on easy mode, spell out the first word that appears, let the second one fall and press restart. Repeat another 38 times and move on to the normal difficulty level, repeat the same actions as on easy mode on normal, and then again on hard.

The achievements unlock after you close down the game.

This game is very easy to complete and you could quite easily figure this out without the guide, but I thought I might write a piece and perhaps help you save a couple of minutes when going for a 100%.