This is a guess the next number game. Guess whether the next number will be bigger than (UP) or smaller than (DOWN) the current number. Initially, you're given 3 credits. Whenever you guess a number incorrectly, your credit decreases, and on the other hand, increases if it's correct. If the credit reaches 0, the game is over and restarts automativally. Please don't hesitate to tell me if you encounter any bug or have any comments and suggestions about this game.