Tiny application on Facebook

Tiny Facebook app (2-5 days). Psychological testing. Expect no less than $10.000 in profit. Payment as a percent from sales only (if not possible for you for any circumstances - place a bid). Will guarantee honesty in any way you propose. Your task - working product, nice design. My job - make sales, promo, make massive sales. Summary of technical details. 50 tests. Text based with rarely pictures. Comments to a test in a text format. First 5 tests for a free. Next - after payment. Ability to send some tests to a friends (for free). Free app for first 1.000 users if recommend this app to friends (some changes and addons like these should be). So, ppl see 50 test names, choose what to take and take. Star some tests (like emails on gmail), taken/not-taken.