Thanks MrGoatsnake, we're glad you like the look of the game.
Yes it's all our own original artwork, and we'd like to keep the game as unique as possible. So I don't think we'd be able to license the images.
We often find it difficult to create good art as well. Our team artist is only able to work part time for us. So it often seems to take forever to get things done For example, we currently have several games ready to go, but we don't have images that are good enough to allow us to release them. So we're often in the same position as you.
We'd like to offer something back to the community though. So we'll see if we can put some different food images together, and post them for free.
Hope that helps