Guess-My-Number

Input your guess using the on-screen keypad, then click the tick.
Use the feedback to improve your next guess.
Click the options button to set the following:
Which number line: 0 to 10, 0 to 20, 0 to 100, 0 to 1000, random 10, random 100, -5 to 5, -10 to 10, -50 to 50?
With or without decimals?
Single or 2 player mode.
Whether to identify the location of the mystery number with a ? or to start with no clue.