Definitely an interesting take on the theme! As someone who likes to get every collectible in games, I think it would be pretty neat if you could see what you need to do to unlock the achievements or at least get hints when you move the mouse over an achievement you're yet to obtain.
Other than that, I really enjoyed creating different life scenarios and living through them! My best score was 1812 (age 116), I got it by only exercising and doing nothing else from about age 1. Here's a screenshot of all the achievements I managed to collect: