Answer:
You play this by saying that you love words without the letter "T" and hate words with "T".
For instance, I love clocks, but I hate time. I love soccer but hate football. I love buses but hate busts.
The actual name of the game is "I love coffee, but I hate T". But when said aloud, it sounds identical to "I love coffee, but I hate tea," which is the source of the game's difficulty.