In Happy Endings, each player has a hand of 7 letter cards. On your turn you play cards to the table, to start spelling a word, or to extend a partial word if one is already on the table. If you finish a word of 4+ letters, you remove it and score 1 point per letter, and start another word if you can. You can play as many cards as you want and can, and at the end you fill up your hand back to 7 cards.
A partial work can be challenged as to whether it starts and actual word. The winner of the challenge get 2 points per card on the table. If a set of letters goes all around the table with no additions, the player who last played gets double points for the cards on the table. In both cases, the cards are removed and the current player can continue.
The game can go to a set number of points, such as 50, or it can go until the deck runs out, and the highest score wins.