Thank you for playing, and for the kind words! The art is from an asset pack, but some of the assets were altered to fit our needs. @84d93r was dealing with all the art, and he did a really good job designing the visuals.
Some kind of tutorial is just another feature we didn't get time to add. I tried to explain the best I could in the Game Page description. We're glad you stuck with it though, and ended up enjoying it!