It'd work better if the quips actually had any relation to the age you put in - for example, I put in my actual date of birth (which makes me 32) and I get "You say you're 21. The lines under eyes say otherwise." or a line about "pretending to be a teenager".
Also the lines about how I'm older than I claim don't really make sense for something like this - there's not really any places where you have to be X Age or YOUNGER to access.