Retro pixel art graphics captivate me to the point of considering buying this game after its review, however reading through the article I don't think it is worth the asking price on the Steam platform, I will have to resort to illegal means unfortunately to enjoy this wonderful game, a great day to you.
It's not always easy to correlate value with price, but after 50+ hours in the game I can definitely say it was worth every penny! However, I do agree that $15 seems a bit steep and waiting for a sale might be the best option.
If you do get to play it, I hope you enjoy it!!