Codex is a game for elementary aged students that uses systematic phonics to build students' skill with decoding, a key literacy skill. Each level introduces one sound. Progress is saved automatically. Use save codes to transfer between devices. Having problems? Email kelsey@oaklandlearn.org. If you're emailing to try to retrieve a lost save, ask your child which level they were on (which sigil or letter they had most recently unlocked) and which skins they had purchased. Include this information in the email.