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Keys should be separated by new lines. Please enter Steam redeemable keys, or gift URLs from Steam, Humble Bundle, or IndieGala. Key giveaways for 50 copies or greater will be automatically distributed to the winners, while giveaways with less than 50 keys will allow you to review the winners before the keys are sent.

I suggest glasses

? That's already implemented, at least works fine for me.

Keys should be separated by new lines. Please enter Steam redeemable keys, or gift URLs from Steam, Humble Bundle, or IndieGala.

Did you see this text under field for keys?