All of the instructions are in-game. Just click the instructions button on the title screen There are only 11 elements, don't go crazy trying to find the 12th I might add more elements later on, as there aren't many right now. It's not meant to be a really fun game, just an idea that I had.
This game is dedicated to my mom for her birthday! It is largely based off of another game called Little Alchemy. It is very fun... https://littlealchemy.com/