Jen Zee is a San-Francisco-based artist and Art Director at SF video game company Supergiant Games.

Her work is amazing! You can see it on her blog or on her deviantart. You can also see her work in the Supergiant games Bastion and Transistor.

Her twitter is @0genzee0.

Here's a short article about her (with many pictures of her work) from Kotaku.