Whoever designed this did a great job. Only wish there was more than one subject to learn about. I finished the entire game in an hour and was disappointed there was nothing else to play. As an adult, I found it very calming (other than the guitar part) and even I learned a lot at age 40. Keep going with this idea and make it into courses about biology, math, history, etc. You could make a LOT of money off of this if you put your time into it and made it a full spectrum of subjects to learn about. Honestly, the possibilities are endless and you could be making a fortune. Don’t let someone else beat you to it.