I don't think it will be a very accurate predictor of ability but it might send the message that you are not a standard company to work for, and make your compa

I don't think it will be a very accurate predictor of ability but it might send the message that you are not a standard company to work for, and make your company stand out in the applicants memory. I'd only consider doing it if game playing is part of your company's ethos, for example as a way to relive tension. As a predictor nothing beats having the applicant write or tinker with a small program.