Other commenters pointed out that the interviewer was stupid to hold this against you, and that this signals what kind of people you might expect to work with - both are correct IMO. The interview goes two way -- it's also your chance to interview your potential employer.

However, here's some additional unsolicited advice: a useful rule of thumb for any portfolio, reference or experience info you may want to bring up during the interview is: Include only the information that will support/advance your changes of getting the job you want

As a contrived example, if you've done a tonne of PHP work but have recently switched to Haskell and want to do more of that, your resume should highlight whatever Haskell stuff you did do, even if trivial, and only mention PHP in passing ("I've also done plenty of work in various other languages such as PHP" - this is not to say to not include the projects, just don't bring up the PHP part).

Specific to your situation, if you've got web/app dev references, code, etc, put them up front. But if not (probably the case here), the games/demos will (should!) be a great showcase of your passion and ability to deliver, and are useful as an indication of how clean / well thought out / polished your code is. The smart interviewers will recognize this.