https://docs.google.com/document/d/1FH8wWe6aHeDnejA7v-4LtnWkFHak6HLDsSsfEEUZnKg/edit?usp=sharing

This document contains all the items in the game and the names given to them in the code, this will be useful for creating your own levels. Sorry if it doesn't qualify as a guide, I didn't know where to put it.