Create ONLINE GAME - Treasure hunt etc

Need a game developer who can create games like Treasure hunt. Need an option to show the user a question ( in document form or video form) and based on this. they should be asked to answer a small QUIZ. Only if they clear the quiz with the min score set they move to level 2 where again the same process is followed.. This goes on to the last stage where they get the final booty. Time taken from start to end is calculated and Leader board is created to show who has taken the least time. Avg time is shown and this USERS time is also shown for them to know where they stand. We need multiple game options like this. Budget shared is for one project. This will be an online module and each user will take this test only once and will take it again only if they havent cleared it. QUOTE THE BEST PRICE. Project will awarded only after showing a DUMMY DEMO.