Create a Very Simple Puzzle game in HTML5

I need to get few puzzles done for my website in HTML5. Looking for a person who can create those puzzles. To start with I want a puzzle of guessing a number. Puzzle will be something like [login to view URL] Few points: 1. Need not be multi-player. Single player is fine. 2. Should be configurable as in the link above. User can select number of digits and repeat allowed. 3. Scoring will depend on number of attempts and time taken.