Nope. The game is on their account.

The dev for this game was giving away two free keys to people who reviewed the game, so there's a lot of extras floating around.

As a thank you, a FREE KEY for the 『STRATEGY GUIDE DLC』 and 2 extra game keys will be sent automatically to your Steam account
if you post a review: within 24 hours, after Epic Quest is released on Steam on September the 25th.

As you might notice, SpankN also has the strategy guide DLC.