로또 매쓰 / Lotto Math
https://play.google.com/store/apps/details?id=com.manyulab.lottomath
외워보아요 / Memorize numbers
https://play.google.com/store/apps/details?id=com.manyulab.memorize
한글 암호 게임 / Hangul Code Game
https://play.google.com/store/apps/details?id=com.manyulab.hangulcodegame